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set terminal svg fname "Helvetica" fsize 25 set output "LinearRegression.svg" set key left set xtics axis 4.0,0.5 set ytics nomirror 1 set border 2 f(x)...

can be rendered as a linear regression (red). French Un nuage de points (en bleu) peut être modélisé par une droite de régression (en rouge). author name...

this work, hereby publish it under the following license: English Linear regression applied to some points author name string: Justinkunimune Wikimedia...

the following Gnuplot file: set terminal svg font "Bitstream Vera Sans,24" set output "Linear-regression.svg" set xrange [0:1] set yrange [2:6] set xzeroaxis...

this work, hereby publish it under the following license: English Linear regression applied to some points with a quadratic trend author name string:...

this work, hereby publish it under the following license: English Linear regression applied to some points with heteroscedasticity author name string:...

html ASQ's Excel template]}} |Source=*[[:File:Check_sheet File:Linear_regression.svg licensed with PD-self 2010-11-05T03:18:26Z Sewaqu 438x289 (43292...

This image is a derivative work of the following images: Linear least squares example2.svg licensed with Cc-by-sa-3.0, GFDL 2011-06-10T03:35:22Z Krishnavedala...

image is a derivative work of the following images: File:Linear_least_squares_example2.svg licensed with Cc-by-sa-3.0, GFDL 2011-06-10T03:35:22Z Krishnavedala...

This image is a derivative work of the following images: Linear least squares example2.svg licensed with Cc-by-sa-3.0, GFDL 2011-06-10T03:35:22Z Krishnavedala...

This image is a derivative work of the following images: Linear least squares example2.svg licensed with Cc-by-sa-3.0, GFDL 2011-06-10T03:35:22Z Krishnavedala...

This image is a derivative work of the following images: Linear least squares example2.svg licensed with Cc-by-sa-3.0, GFDL 2011-06-10T03:35:22Z Krishnavedala...

durch Linearisierung und linearer Regression anhand der Antoine-Gleichung, vgl. [[:File:2,3-Dimethylbuttersäure Antoine-Plot.svg]]. author name string:...

Derivative works of this file:  Linear regression scatterplot with generic formula.png English determination method or standard: SHA-1...

image is a derivative work of the following images: File:Linear_least_squares_example2.svg licensed with Cc-by-sa-3.0, GFDL 2011-06-10T03:35:22Z Krishnavedala...

name}}. It is recommended to name the SVG file “Log-linear plot of coronavirus cases with linear regressions.svg”—then the template Vector version available...

DescriptionLinear Regression - it.svg English: Illustration of linear regression on a data set, Italian nouns. Source Own work Author F l a n k e r Permission...

how a data set is biased and estimated using linear mixed models vs. just using a linear squares regression. object of statement has role: photographer...

following license: English S&P 500 Log $ Chart 1950 to Feb 2024 with Linear Regression Trend and other Graphs author name string: Richardhy Wikimedia username:...

DescriptionSimpleLinearRegressionSketch.svg English: Shows a dataset and the estimated regression line and for one observation x_i, y_i, hat(y)_i and hat(u)_i...

File:Linear regression.svg is a vector version of this file. It should be used in place of this PNG file when not inferior. File:Linear regression.png...

DescriptionSimpleLinearRegressionSketch2.svg English: Shows a dataset and the true (blue) and estimated (red) regression line and for one observation...

sklearn import metrics from sklearn.linear_model import LinearRegression from sklearn.ensemble import RandomForestRegressor from sklearn.metrics import r2_score...

7, 3.5]); saveas(gcf, 'Linear_least_squares2.eps', 'psc2'); % save as eps %plot2svg('Linear_least_squares.svg'); % save as svg function ball(x, y, r,...

English Illustration of linear least squares. French Illustration de la méthode des moindres carrés avec une fonction linéaire. determination method or...

// ********** // fonctions // ********** // régression circulaire linéaire function [C, r, R]=regression_circulaire(X, Y) // X, Y : points expérimentaux...

1.3, -1.1, -3.0, -2.5, 1.3]; // fonctions // régression circulaire linéaire function [C, r, R]=regression_circulaire(X, Y) // X, Y : points expérimentaux...

File:Savitzky-golay pic gaussien bruite.svg. For the use of the ℓ1 norm, we use the standard non-linear least square regression dunction, leastsq(), but the residual...

and derivation, see File:Savitzky-golay pic gaussien dissymetrique bruite.svg. // ********** // Constants and initialisation // ********** clear; clf;...

fonctions communes sont identiques à ceux de File:Regression pic gaussien dissymetrique bruite.svg. // ********** // Constantes et initialisation // **********...

DescriptionLinear regression plot with R.svg Deutsch: Beispiel eines einfachen Punkt-Diagramms und der Anpassungsgeraden der linearen Regression. Das Diagramm...

image name}}. It is recommended to name the SVG file “Роадмап линейная регрессия. (linear regression roadmap).svg”—then the template Vector version available...

subset(BostonHousing, (BostonHousing$medv<50) & (BostonHousing$rm>=4)) svg("bostonh_sqhetres.svg", width=10, height=5) par(mfrow=c(1,3)) plot(x$rm, x$medv, xlab="Mitt...

bytes) {{Information |Description= Straight line fit |Source=self-made |Date=2008-01-20 |Location Linear least squares |Author= user:PeterGans}} English...

28.0_database_schema.svg”. Available: https://upload.wikimedia.org/wikipedia/commons/9/94/MediaWiki_1. 28.0_database_schema.svg “Wikipedia Wikitech. Portal:...

Wikipedia, https://en.wikipedia.org/wiki/Cluster_analysis# /media/File:Cluster-2.svg Another simple example in 2 dimensions is identifying patterns between low...

[2] https://en.wikipedia.org/wiki/File:Elements_of_Industry_Structure.svg#file Five Forces Analysis - New Entrants Force Comments Economies of...

idfnormal(F, 0, 1); [a_norm, b_norm, sigmanorm] = reglin(tt', t_norm'); // régression linéaire sigma_norm = 1/a_norm; mu_norm = -b_norm*sigma_norm; Rnorm =...

col=3) legend(15,900,col=c(1,3),legend=c("Data Points","Linear Regression"),fill=c(1,3)); text(100,991,labels="Adj.",col=3) text(110,1000...

sklearn import metrics from sklearn.linear_model import LinearRegression from sklearn.ensemble import RandomForestRegressor from sklearn.metrics import r2_score...

% Illustration of linear least squares. function main() % KSmrq's colors red = [0.867 0.06 0.14]; blue = [0, 129, 205]/256; green = [0 100 0]/256; green=[0...

import os from scipy.interpolate import Rbf from sklearn.linear_model import LinearRegression from sklearn.preprocessing import PolynomialFeatures from...

% Illustration of linear least squares. function main() % KSmrq's colors red = [0.867 0.06 0.14]; blue = [0, 129, 205]/256; green = [0, 200, 70]/256; yellow...

truetrue English Non linear regression to fit the curve with the sum of a lorentzian function and a gaussian function. French Régression non linéaire pour...

Commons Attribution-Share Alike 4.0 truetrue English German Erklärung der Regression author name string: Yomomo Wikimedia username: Yomomo URL: http://commons...

below. http://commons.wikimedia.org/wiki/File:Compass_rose_browns_00.svg Students can see how directions such as SWS, NNW, etc bisect the traditional...

U(1)*V(2) - U(2)*V(1); endfunction function [Xp, Yp, B, N, ux, uy] = regression_plan(X, Y, Z) // But : se placer dans le plan moyen // Moyen : à partir...

DescriptionBostonh hetres Lineare Regression.svg English: Linear fit and residual plot of a subset of the Boston Housing data. Date 26 April 2013, 20:52:05...

DescriptionRegression lineaire avec R.svg Français : Régression linéaire avec le logiciel R. English: Linear regression with the software R. Date 1 August...

versions File:Linear_least_squares_example2.png Derivative works of this file: Regression lineaire abscisses ordonnees orthogonal.svg Regression lineaire abscisses...

color[BostonHousing$dis<2] <- "red" color[BostonHousing$dis>7] <- "blue" svg("ResidualsForGQTest.svg") plot(BostonHousing$dis, lm$residuals, pch=19, col=color, cex=0...

DescriptionRegression plane avec R.svg Français : Régression linéaire à 3 dimensions avec GNU R (modifié avec Inkscape). English: 3-demensional linear regression...

age grom EGIP depth-age file. Age-depth relation is calculated with linear regression, and aampled data is ganerated with 1-D interpolation. Depth-age file...

DescriptionIsotonic regression.svg English: A graph of an isotonic regresion and a linear regression fit for a data set. Generated using scikit-learn library...

function(x) { return ( 1-2*x); } # x <- (0:100)/100 y <- fun(x) svg("HolyTrinity.svg") plot(x,y, type="l", ylab="", xlab="", xaxt="n", yaxt="n", main="LogLikelihood")...

Creative Commons Attribution-Share Alike 3.0 truetrue en:Nonparametric_regression English URL: https://commons.wikimedia.org/wiki/user:Brmccune Wikimedia...

DescriptionLinear least squares.svg Illustration of linear least squares. Date 2 February 2008, 19:15 (UTC) Source self-made with MATLAB, tweaked in Inkscape...

import UnivariateSpline from sklearn.linear_model import LinearRegression from sklearn.linear_model import LinearRegression from sklearn.preprocessing import...

DescriptionSegmented linear regression graph showing yield of mustard plants vs soil salinity in Haryana, India, 1987–1988.jpg English: A segmented linear regression graph...

svg(paste0("temp_anomalies_2000yrs_pages2k-en.svg"),width=7.087*1.67,height=5.67*1.67*0.5,bg = "white") # axis xl<-c(0,2010) yl<-c(-0.9,0.4) # margins...

  This file has been superseded by Linear least squares2.svg. It is recommended to use the other file. Please note that deleting superseded images requires...

fitted linear.svg English: Graph of points and linear least squares fit in the simple linear regression numerical example by CMG Lee. In the SVG file,...

DescriptionHigh-dimensional linear model.svg English: Illustration of the linear model in high-dimensions Date 7 April 2021 Source Own work Author Unknown...

was created as a pdf file by the following Python code, then converted to SVG. from pyx import canvas,path,color from random import random,seed seed(12345)...

DescriptionLinear least squares geometric interpretation.svg Geometric interpretation of the solution of a linear system in a least squares sense. Date...

expression("Quarterly change in GDP ( " *Delta* "%)") ) #Draw regression line based on linear model abline(lm(gdpch ~ unempch), col="red") gdpch = {1.5671...

DescriptionFA Hist regression.jpg English: Linear relationship between number of images and history FA article size Date 21 June 2011 Source Own work Author...

to converge. In this case, it is converging on two parameters for linear regression, attempting to minimize the cost function, J ( θ 0 , θ 1 ) {\displaystyle...

versions Bostonh hetres Lineare Regression.svg Bostonh hetres Heroskedastische Residuen.svg SVG development InfoField  The SVG code is valid.  This diagram...

DescriptionR2explain.svg Deutsch: Erklärung von Größen bei der Regression Date 6 April 2018 Source Own work Author Debenben...

Inkscape . Author Oleg Alexandrov Other versions Image:Linear least squares geometric interpretation.svg, but that one renders poorly with the current renderer...

DescriptionHeightmass-wh.svg English: Simple linear regression model of the data in w:Ordinary least squares along with Working-Hotelling confidence bands...

DescriptionHeightmass-bonf (1).svg English: Simple linear regression model of the data in w:Ordinary least squares along with Bonferonni confidence bands...

DescriptionCoefficient of Determination.svg English: An illustration of the coefficient of determination for a linear regression. The coefficient of determination...

DescriptionBostonh hetres Heroskedastische Residuen.svg English: Linear fit and residual plot of a subset of the Boston Housing data. Date 26 April 2013...

geometric interpretation.svg English: Linear regression of y on X can be viewed as an orthogonal projection of vector y on the linear subspace spanned by X;...

raw data and the thick curve that has been smoothed using local linear kernel regression. The y-axis is logarithmic above 1. In addition, the dates of some...

DescriptionVariables independantes.svg Français : Nuages de points illustrant des variables indépendantes - Cas où une régression linéaire n'est pas adaptée Date...

svg Français : Expérimentation du cannabis en France chez les 15-44 ans dans les années 1990 et 2000 : données de sondages (points) et régression linéaire...

DescriptionR2intro.svg Deutsch: "Wahre" Gerade y {\displaystyle y} mit darum gaussverteilten Punkten, rotem Fit y ^ {\displaystyle {\hat {y}}} und Residuen...

April 2014, 12:20:22 Source Own work Author HB SVG development InfoField  The SVG code is valid.  This vector image was created with an unknown SVG tool....

DescriptionR2anim23.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim32.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim24.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim33.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2values.svg Deutsch: Zwei Regressionen mit unterschiedlichem Bestimmtheitsmaß Date 6 April 2018 Source Own work Author Debenben...

DescriptionR2anim35.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim22.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim10.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim3.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim9.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim11.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim5.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim15.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim18.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionMDKQ4.svg Deutsch: Ausreißer bei linearer Approximation Date 2 February 2011 Source Own work, Neufassung von Ausreißer.png by Philipendula...

DescriptionR2anim29.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionTotal least squares.svg English: Illustration of total least squares Date 2 June 2011 Source Own work Author Netheril96...

DescriptionChowtest1.svg English: illustration of the chow test X=[0.5,1.0,1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0] Y= [-0.043, 0.435, 0.149, 0.252, 0...

DescriptionChowtest8.svg English: chow test illustration Date 1 April 2018 Source Own work Author Kmhkmh...

DescriptionChowtest2.svg English: chow test illustration X=[0.5,1.0,1.5,2.0,2.5,3.0,3.5,4.0,4.5,5.0,5.5,6.0] Y= [-0.043, 0.435, 0.149, 0.252, 0.571, 0...

DescriptionChowtest4.svg English: chow test illustration X=[0.080, 0.16, 0.24, 0.32, 0.40, 0.48, 0.56, 0.64, 0.72, 0.80,0.88, 0.96, 1.0, 1.1, 1.2, 1.3...

DescriptionGráfico de dispersão A.svg Português: Gráfico de dispersão e reta de regressão linear para os dados X: Custo com propaganda = [R$ 1.000,00,...

DescriptionR2anim26.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim13.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim2.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim12.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim27.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim25.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim6.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim34.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim14.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim19.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim17.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim8.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim21.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim7.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim16.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim20.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionGewichtLebenstag.svg Deutsch: Gewicht eines Babys in Abhängigkeit vom Lebenstag / Bsp.graph GNU R Date 10 April 2014 Source Own work Author...

DescriptionR2anim31.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim30.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim28.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionR2anim4.svg English: illustration of coefficient of determination Date 30 April 2018 Source Own work Author Debenben...

DescriptionChowtest7.svg English: chow test illustration Date 2 April 2018 Source Own work Author Kmhkmh...

varies, then it is possible to determine the polynomial by multi-linear regression. // ********** // Constants and initialisation // ********** clear;...

DescriptionObserverError01.svg English: Example for observer error Date 10 October 2025 Source Own work Author Yomomo...

DescriptionChowtest5.svg English: chow test illustration Date 2 April 2018 Source Own work Author Kmhkmh...

DescriptionObserverError02LR.svg English: Observer Error Cultural Bias Example Date 11 October 2025 Source Own work Author Yomomo...

DescriptionChowtest6.svg English: chow test illustration Date 2 April 2018 Source Own work Author Kmhkmh...

DescriptionObserverError01LR.svg English: Observer Error Cultural Bias Example Date 11 October 2025 Source Own work Author Yomomo...

DescriptionObserverError01Y.svg English: Example for observer error Date 10 October 2025 Source Own work Author Yomomo...

DescriptionObserverError02.svg English: Example for observer error Date 10 October 2025 Source Own work Author Yomomo...

DescriptionObserverError02Y.svg English: Example for observer error Date 10 October 2025 Source Own work Author Yomomo...

DescriptionLinreg.svg Just an example of what a linreg is, made with matlab and converted into SVG format using Juerg Schwizer's remarkable script [1]...

DescriptionResidualSketch1.svg English: Structual types od residuals desired in linear regression (top left) and not desired (all other plots) Date 4 December...

DescriptionOkun's Law.svg English: Linear Regression of the Unemployment rate on RGDP growth. Date 15 March 2017 Source Own work Author Acheck10...

Table 6.15 (Biomass 1990-2019) Biomass 1983-1989 is produced from a linear regression of table 8.1 which shows biomass energy used in electricity generation...

DescriptionChowtest3.svg English: chow test illustration X=[0.080, 0.16, 0.24, 0.32, 0.40, 0.48, 0.56, 0.64, 0.72, 0.80,0.88, 0.96, 1.0, 1.1, 1.2, 1.3...

DescriptionMedian-Median Method.svg Français : Ajustement affine par la méthode Médiane-Médiane Date 29 April 2014, 12:20:22 Source Own work Author HB...

DescriptionOkun's Law 2016.svg English: Linear regression of change in UN rate on RGDP growth in the U.S. Date 15 March 2017 Source Own work Author Acheck10...

DescriptionWhole brain emulation.svg English: Future projections and prediction intervals (95% prediction confidence) using linear regression. Date 13 September 2020...

Landwirtschaft (BZL) dargestellt. Aufgrund dieser Daten wurde mit Hilfe von linearer Regression eine Trendlinie erstellt, die den Konsum bis zum Jahr 2050 prognostizieren...

DescriptionL1 and L2 balls.svg English: Balls for L1 and L2 norms and their intersection with a linear objective function. Date 23 April 2017 Source Own...

DescriptionOkun's Law through 2016.svg English: Linear regression of change in UN rate on change in RGDP growth. Date 15 March 2017 Source Own work Author...

computed using a robust linear regression. The coefficient of determination is computed similar to ordinary least squares regression. The peak velocities...

DescriptionGráfico de dispersão B.svg Português: Gráfico de dispersão para os dados X: Massa corporal = [90, 120, 60, 40, 82, 90] e Y: Consumo anual de...

estimates have been derived using an empirical approach, with multiple linear regression and energy balance models. Top panel shows surface temperature, based...

and regulations grew at roughly 150,000 words per year. (A standard linear regression estimated the slope at 151,610 words per year with a standard error...

Table 6.15 (Biomass 1990-2019) Biomass 1983-1989 is produced from a linear regression of table 8.1 which shows biomass energy used in electricity generation...

Mar-2009, Sep-2009, Mar-2010, Mar-2011. Data are coefficients from linear regression fits per country. Chart was created using the 'rworldmap' package...

DescriptionHeightWeightExample.WrongConversion.Quadratic.Residuals.png English: In Linear regression the example data gives heights in metres, but the original values...

DescriptionHeightWeightExample.CorrectConversion.QuadraticFit.png English: In Linear regression (now Ordinary least squares) the example data gives heights in metres...

DescriptionHeightWeightExample.CorrectConversion.Quadratic.Residuals.png English: In Linear regression the example data gives heights in metres, but the original values...

DescriptionHeightWeightExample.CorrectConversion.Cubic.Residuals.png English: In Linear regression the example data gives heights in metres, but the original values...

DescriptionS&P 500 Chart 2025.svg English: S&P 500 Max Min Chart to Jan 2025 with Trend and other plots. REFERENCES: S&P 500 Data from Finance Yahoo history:...

DescriptionChow test example2.png English: linear regression with a structural break as an illustration for the chow test Date 3 October 2008 Source Own...

DescriptionChow test example.png English: linear regression with a structural break as an illustration for the chow test Date 2 October 2008 Source Own...

DescriptionChow test structural break.png English: linear regression with a structural break as an illustration for the chow test Date 2 October 2008...

DescriptionChow test substructures.png English: linear regression with 2 subgroups as an illustration for the chow test Date 2 October 2008 Source Own...

different types of regression are indicated, and these are linear regression, logistic regression, and survival analysis regression. Date 7 January 2017...

File:ACP 1.svg is a vector version of this file. It should be used in place of this PNG file when not inferior. File:ACP 1.png → File:ACP 1.svg For more...

import UnivariateSpline from sklearn.linear_model import LinearRegression from sklearn.linear_model import LinearRegression from sklearn.preprocessing import...

using vector graphics as an SVG file. This has several advantages; see Commons:Media for cleanup for more information. If an SVG form of this image is available...

File:Total least squares.svg is a vector version of this file. It should be used in place of this JPG file when not inferior. File:Total least squares...

DescriptionCNH Figure 7.jpg Simple linear regression line linking observed annual average global temperature to the levels of carbon dioxide in the atmosphere...

DescriptionRandomSearchExample2.png English: Scheme of random search using a non-linear regression problem as an example. The goal is to minimize the value of the penalty...

all reported GISAID strains on the y-axis and month on the x-axis. Linear regression line shown along with Pearson’s correlation, r = 0.78, P = 0.008."...

y-axis and month on the x-axis (ex: 3 = March, 4 = April, etc.). Linear regression line shown along with Pearson’s correlation, r = 0.97, P = 0.00003...

model the ensuing dependencies among the outputs with a time-lagged linear regression of the current response on previous responses (up to an order denoted...

end pdf2svg southwest.pdf pueblo_culture_area_potential_npp_1981_2010_1.svg pdftoppm -png -rx 1000 -ry 1000 southwest.pdf pueblo_culture_area_potential_npp_1981_2010_1...