Plotting multiple functions in the same graph

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Moslem Uddin 2020-4-14

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链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517770-plotting-multiple-functions-in-the-same-graph

评论： Walter Roberson 2020-4-22

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I want to plot two different functions in a same graph for different values of a parameter.

I tried the following code:

clc
clear all
syms y
t=[1 5];
for i=1:length(t)
    U=exp(-y)*sin(t(i));
    fplot(U,y,[0,5]); hold on;
    U1=exp(-y)*cos(t(i));
        fplot(U1,y,[0,5]); hold on;
end

Is that alright?

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采纳的回答

Walter Roberson 2020-4-14

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/517770-plotting-multiple-functions-in-the-same-graph#answer_425969

在 MATLAB Online 中打开

syms y
t=[1 5];
for i=1:length(t)
    U=exp(-y)*sin(t(i));
    fplot(U,[0,5]); hold on;
    U1=exp(-y)*cos(t(i));
    fplot(U1,[0,5]);
end
hold off

Or you could

syms y
t=[1 5];
for i=1:length(t)
    U=exp(-y)*sin(t(i));
    U1=exp(-y)*cos(t(i));
    fplot([U,U1],[0,5]);
    hold on
end
hold off

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Moslem Uddin 2020-4-21

编辑：Moslem Uddin 2020-4-22

Is there any other way performing this plotting without using for loop? For loop seems to reducing Matlab's performance. @walter roberson

Walter Roberson 2020-4-22

在 MATLAB Online 中打开

If your t is fixed length, you can "unroll the loop", just putting all of the instructions in a row:

  syms y
  t=[1 5];
  U=exp(-y)*sin(t(1));
  fplot(U,[0,2]); hold on;
  U1=exp(-y)*cos(t(1));
  fplot(U1,[2,5]);
  
  U=exp(-y)*sin(t(2));
  fplot(U,[0,2]);
  U1=exp(-y)*cos(t(2));
  fplot(U1,[2,5]);
  hold off