Plotting multiple graph in same graph

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Mr. 206 2018-9-12

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/418686-plotting-multiple-graph-in-same-graph

评论： dpb 2018-9-13

I am trying to plot all the graphs of each txt file in one graph. I am using this code but it is plotting them separately. Here is my code..

    %Creating a continuous loop which will only stop after reaching j=size(READ,2)  
    c = 0;  
    %graphics_toolkit gnuplot
    figure('visible','off');hold on
    %This lopp will take column 1,3,5,7...............     
    for j = 1: 2 : size(READ,2)
      c = c+1; 
      clf
      x=READ(:,j);
      y=READ(:,j+1);  
      plot(x_0,y_0)
    end
    hold off
  end

采纳的回答

dpb 2018-9-12

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/418686-plotting-multiple-graph-in-same-graph#answer_336551

在 MATLAB Online 中打开

    ...
    for j = 1: 2 : size(READ,2)
      c = c+1; 
      clf
      ...

Well, you wipe out everything up to here--if the point is to add to the given figure, this defeats that.

clf is almost never needed in script or function; as a general rule forget it and cla and friends even exist; only when you discover a need go and dust them off...

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Mr. 206 2018-9-13

编辑：Mr. 206 2018-9-13

Using this piece of code i am saving all the separate graph in "Test_output_01" folder.

%Now saving the file in a certain directory        
            fileName = ['/home/ali/Master_Thesis_Ali/Test_output_01/', initialFileName, '.png'];        
            print(fileName, '-dpngcairo');

I just dont want to repeat the whole

for j = 1:2:size(READ,2) 
loop again just to plot them together.

So what i want is to tweak the loop a bit to plot & save them separately in "Test_output_01" folder and together in folder "Test_output_02".

Accept my apology if i can't make myself clear. And thanks for your help.

dpb 2018-9-13

Inside the loop you need both directory names and to write to each after you've drawn the specific figure that belongs in that subdirectory.

You may find structuring the code to do this simpler if you encapsulate the existing code into its own function but with another couple of inputs; a flag as to whether to create multiple plots on a single figure (hold on) or to create a figure for each data set (hold off) and the name of the directory to use for output.

Then you could simply call that function from an outer loop with the control variables as wanted and not have to try to mung internally to the function itself.

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