Saving figures in a for loop

Question

Cameron Power 2018-7-11

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/409892-saving-figures-in-a-for-loop

编辑： OCDER 2018-7-11

I am trying to save each plot in a for loop but I omly end up with Day_31.png, the last plot, this is the could I have;

k = 31;
for l = 1:k
  Days = ShearEnv_1.Day;   
  index = Days == l;   
  ShearA = ShearEnv_1(index,:);    
  ShearB = figure,
  plot(ShearA{:,5}, ShearA{:,12}.*10, 'b-'),
  ylim([0 360]),
  grid minor;
  saveas(ShearB,sprintf('Day_%d.png',k));
end

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Answer 1

OCDER 2018-7-11

1
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https://ww2.mathworks.cn/matlabcentral/answers/409892-saving-figures-in-a-for-loop#answer_328479

在 MATLAB Online 中打开

You're saving 31 graphs to the same file name, 'Day_31.png' due to wrong use of iterator k.

k = 31;
for l = 1:k
  Days = ShearEnv_1.Day;   
  index = Days == l;   
  ShearA = ShearEnv_1(index,:);    
  ShearB = figure,
  plot(ShearA{:,5}, ShearA{:,12}.*10, 'b-'),
  ylim([0 360]),
  grid minor;
  saveas(ShearB,sprintf('Day_%d.png',l));  <==== not k, which is 31. use l as shown.
end

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dpb 2018-7-11

Good catch, I thought I'd checked that... :(

OCDER 2018-7-11

编辑：OCDER 2018-7-11

在 MATLAB Online 中打开

I'm surprised the loop even finished, considering this other error that was hiding there ...

plot(ShearA{:, 5}, ShearA{:, 12}.*10, 'b-'); %??

See below for details:

ShearA = num2cell(randi(10, 100, 12)); %Assuming ShearA is a cell
plot(ShearA{:, 5}, ShearA{:, 12}.*10, 'b-');    %This will not work
plot([ShearA{:, 5}], [ShearA{:, 12}]*10, 'b-'); %This will work

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