MATLAB: Error: Attempt to add (variable) to a static workspace,

attempt to add (variable) to a static workspace

My function

function Densite
 load x;
 load h
 if ...........................
         .................
 elseif ........................
     ........................
 end
end
error
Error using ===> load
 Attempt to add "x" to static workspace
Errr in ===> Densite 
   load x;

Best Answer

Try

function Densite
%  load x;
%  load h
in = load('x.mat','x'); % If these were together in one file, like 'data.mat' 
x = in.x;               % then you could load both at once
in = load('h.mat','h');
h = in.h;
 if ...........................
         .................
 elseif ........................
     ........................
 end
end
error
Error using ===> load
 Attempt to add "x" to static workspace
Errr in ===> Densite 
   load x;

Related Solutions

MATLAB: How to extract value from .mat file

Hello Samah,

It's not entirely clear to me what you are looking for. If you have a MAT file that contains an array, and you want only the last element of the array, you could do something like this:

load myMatFile.mat myArrayName
val = myArrayName(end);

If using load, it is generally good practice to specify which variables are being loaded. This allows the code to be more readable by seeing where variables originate from.

You can also use the matfile function to access the data within the MAT file, without explicitly loading all variables. This only works for numeric data, and is most efficient if the MAT file was saved with the v7.3 setting or argument.

m = matfile('myMatFile.mat');
val = m.myArrayName(end);

Hope this helps!

-Cam

MATLAB: Plot array of x ,y both in 2 columns, got unexpected multiple line result.

Just one line is ploted. See this:

% plot_array_result_in_multiple_line.m
load('X.mat','X');
load('Y.mat','Y');
h = plot(log10(X(:,1)),20*log10(hypot(Y(:,1),Y(:,2))));
title( ['Plot Bode']);
xlabel( 'x=Freq-axis (in 10^n)') , ylabel( 'y=data value-axis (in dB)' );    
grid on;
findobj(h)
ans = 
  Line with properties:
              Color: [0 0.4470 0.7410]
          LineStyle: '-'
          LineWidth: 0.5000
             Marker: 'none'
         MarkerSize: 6
    MarkerFaceColor: 'none'
              XData: [1×3505 double]
              YData: [1×3505 double]
              ZData: [1×0 double]
  Show all properties

The problem is that you have repeated X(1) values (i.e. X(371) == X(1773)), but the corresponding Y are different. For that reason you get "unexpected results".

Best Answer

Related Solutions

MATLAB: How to extract value from .mat file

MATLAB: Plot array of x ,y both in 2 columns, got unexpected multiple line result.

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