Plot with loop work only for the last

Question

Ferial Assmani 2016-3-29

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评论： Ferial Assmani 2016-4-1

Dear all, on a loop (i=1:Nbr_Position) I get only the last plot

V_Time = [1, 2, 3];                           % Time Vector fixe length
%
V_Data = 1:1:12;                              % Data Vector
Nbr_Position = 2;                             % Nbr of position 
Nbr_Case   = 2;                               % Nbr of cases
%
N_Rows= length(V_Time);                       % Nbr of rows for matrix
N_columns= length(V_Data)/N_Rows;             % Nbr of columns for matrix
M_Brut= (reshape(V_Data,[N_Rows,N_columns])); % Brut matrix from Data Vector
%
%
for i=1:Nbr_Position                                     % loop by position
       M_Nett{i} = M_Brut(:,(i):(Nbr_Position):(end));   % Nett matrix
          for j=1:Nbr_Case                               % loop by case
              plot(V_Time,M_Nett{i}(:,1:j)')             % plot pair
              title(['Position N°: ' num2str(i)])    % title
              legend(genvarname(repmat({'Case'},1,j),'Case'))  % legend
          end
end

Why i cannot get the plot for i = 1 and i = 2 ?????

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Answer 1

Azzi Abdelmalek 2016-3-29

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在 MATLAB Online 中打开

Use

hold on

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Ferial Assmani 2016-3-29

Coup d'un magicien, Merci beaucoup

Ferial Assmani 2016-4-1

在 MATLAB Online 中打开

Dear Mr Azzi, for reason of clarity, i want to plot separately all figures, thy mast be (Nbr_Position * Nbr_Case) plot, i have tried this but it does not work:

clear all; clc; close all;
V_Time = [1, 2, 3];                           % Time Vector fixe length
%
V_Data = 1:1:12;                              % Data Vector
Nbr_Position = 2;                             % Nbr of position
Nbr_Case   = 2;                               % Nbr of cases
%
N_Rows= length(V_Time);                       % Nbr of rows for matrix
N_columns= length(V_Data)/N_Rows;             % Nbr of columns for matrix
M_Brut= (reshape(V_Data,[N_Rows,N_columns]))  % Brut matrix from Data Vector
%
%
for i=1:N_columns                       % loop by position
  figure
  for j=1:Nbr_Case                      % loop by case
      plot(V_Time',M_Brut(:,i))         % plot Time Vs M_Brut (Data i line)
  end 
  title(['Position N°: ' num2str(i) '  &' '  Case ' num2str(j)])  % title
  legend(['Case' num2str(j)])                                     % legend
end

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Answer 2

Ced 2016-3-29

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/275949-plot-with-loop-work-only-for-the-last#answer_215449

在 MATLAB Online 中打开

The matlab documentation is really good for that:

Plot Help

You need to:

a) open a new figure in each iteration of i

b) Keep the old lines as Azzi Abdelmalek pointed out.

for i=1:Nbr_Position                                     % loop by position
   %%OPEN NEW FIGURE WINDOW HERE
   %%MAKE SURE OLD LINES ARE KEPT (see Azzi's answer)
   for j=1:Nbr_Case                                  % loop by case
          plot(V_Time,M_Nett{i}(:,1:j)')             % plot pair
          % ...
   end
end