Adding a Legend with Variables as inputs

Question

JDM_master 2020-1-22

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501500-adding-a-legend-with-variables-as-inputs

评论： Adam Danz 2020-1-22

Im very new to MATLAB and Ive got a script which takes in an array determined by the user, does some calculations and then plots it on a graph with the x-axis being in the range chosen by the user. So, naturally the number of curves in my graph will be a variable so how do I get it to show what on the legend. This is what Ive got so far but it is not working. (lambda is a constant).

hold on
for  r = (minr : incrr : maxr) %start the plotting
    z = (r./lambda).*((r./lambda).^(r-1)).*(exp(-(x./r).^r)); %The equation
    plot(x,z)
    xlabel('x');
    ylabel('f(x)');
    title('GRAPH__1');
end
for i = minr : incrr : maxr
    labelr = sprintf('r = %.2f',r);
end
for j = lambda
    label_lambda = sprintf('lambda = %.2f',lambda);
end
legend(labelr,label_lambda);
hold off

1 个评论
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Adam Danz 2020-1-22

编辑：Adam Danz 2020-1-22

@JDM_master, I've formatted your code so that it's correctly indented. To easily smart-indent you code from the Matlab Editor, highlight all of it (ctrl+a) and smart indent (ctrl+i). Its so much more readable this way.

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Answer 1

Adam Danz 2020-1-22

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/501500-adding-a-legend-with-variables-as-inputs#answer_411464

编辑：Adam Danz 2020-1-22

在 MATLAB Online 中打开

Try this.

hold on
for  r = minr : incrr : maxr %start the plotting
    z = (r./lambda).*((r./lambda).^(r-1)).*(exp(-(x./r).^r)); %The equation
    plot(x,z,'DisplayName',sprintf('r = %.2f',r))
    xlabel('x');
    ylabel('f(x)');
    title('GRAPH__1');
end
% I'm not sure what this section is about....    
% for j = lambda
%    label_lambda = sprintf('lambda = %.2f',lambda); end
% end
legend(); % no need for inputs if you're using DisplayName
hold off

7 个评论
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JDM_master 2020-1-22

在 MATLAB Online 中打开

opengl info
                          Version: '4.5.13572 Compatibility Profile Context 19.11.3 26.20.13031.18002'
                           Vendor: 'ATI Technologies Inc.'
                         Renderer: 'AMD Radeon(TM) Vega 8 Graphics'
            RendererDriverVersion: '26.20.13031.18002'
        RendererDriverReleaseDate: '15-Nov-2019'
                   MaxTextureSize: 16384
                           Visual: 'Visual 0x08, (RGBA 32 bits (8 8 8 8), Z depth 16 bits, Hardware acceleration, Double buffer, Antialias 8 samples)'
                         Software: 'false'
             HardwareSupportLevel: 'full'
        SupportsGraphicsSmoothing: 1
    SupportsDepthPeelTransparency: 1
       SupportsAlignVertexCenters: 1
                       Extensions: {303×1 cell}
               MaxFrameBufferSize: 16384