why is plot from workspace(using load command ) is slow ?

Hi I want to plot data from workspace (using the load command ) ,but for some reason the plot is very slow and then matlab gets stuck , why is that ?

I uploaded the workspace file,and the code I display here :

    ADC_data_lim43=load('Data_Lim_43');
    dec_limit=43;
    f_RD_not=892.858e3;
    real_data_ADC=ADC_data_lim43.real_data_ADC;
    I_real=real_data_ADC*(19.6e-3)/(100*15e-3);    %%real current 
    real_data_IN_driver=ADC_data_lim43.real_data_IN_driver; %% real gate signal 
    t=(1/f_RD_not)*(1:length(real_data_IN_driver));      %% time 
    figure(101);
    plot(t,I_real,' red -- d ','linewidth',1);                                              %% plot--> of I_real 
    hold on ;   
    plot(t,dec_limit*(19.6e-3)/(100*15e-3)*ones(size(t)),' black ','linewidth',3);                              %% plot--> of boundery limit  
    hold on ;
    plot(t,100*(19.6e-3)/(100*15e-3)*real_data_IN_driver*ones(size(t)),' blue -- O ','linewidth',1);    %% plot--> comperator output 
    title(['  I_1(t) from ADC , Boundery Limit Current=' num2str(dec_limit*(19.6e-3)/(100*15e-3)) '[A]']);
    ylabel('I[A]');xlabel('time[ mSec]');grid on;
    legend ('I_{real}','boundery limit','comperator output');
    xlim([ 0 t(end)]);  %% limits of the x axis
    xticks([0:0.0002:t(end)]); %% jumps of X axis 
    ylim([ 0 max(I_real)]);  %% limits of the y axis       
    yticks([ 0:0.1:max(I_real)]); %% jumps of Y axis 
 

I also tried using opengl command and changed Software option to 'true' (it was 'false') but now it works even worse ...

Answer 1

[Walter Roberson]

100*(19.6e-3)/(100*15e-3)*real_data_IN_driver*ones(size(t))

That code involves a 2040 x 1 matrix, and the * operator, and ones(size(t)) is 1 x 2040 . So you have (2040 x 1) * (1 x 2040) and the result of that is a 2040 x 2040 matrix. You are therefore asking MATLAB to plot 2040 lines of 2040 elements each.

[tomer polsky]

oh right ... my bad , thank you for your help .