from figure file to mat file?

Hi, I have saved a fig file and now I want to do some operation on it. I have tried

example=load("name.fig",'-mat');

but it doesn't give me a mat file.

Do you know how to convert?

Answer 1

[Mathieu NOE]

hello

you can use that function to extract data from figures

function data = extract_data_from_figures(filename)
%%
% 
% Input  : File name <filename.fig> 
%          with multiple plots in a single file
% Output : struct data
%        : data.names  contains names of the display object Yvalues
%        : data.Y      contains the actual plot values withthe first column
%                      containing the x-values
%
% Written by Chetanya Puri, 2019
% Last Modified: Nov 6, 2019
%

fig = openfig(filename); % Open figure and assign it to fig object
dataObjs = findobj(fig,'-property','YData'); % Find all graphic objects with YData, in our case line values
xval        = dataObjs(1).XData; % Find the X-axis value
Ymat = [xval(:)]; % Create a matrix with first column of x values
for i=1:length(dataObjs)
    legend_name{i,1} = dataObjs(i).DisplayName;
    yval        = dataObjs(i).YData;
    Ymat = [Ymat yval(:)]; % Keep appending column vectors
end
close(fig); % close the figure
data.names = ['X';legend_name]; 
data.Y = Ymat;
end

[MementoMori]

Thank you. It gives me error:

Unrecognized method, property, or field 'DisplayName' for class 'matlab.graphics.primitive.Image'.

Error in extract_data_from_figures (line 19)
legend_name{i,1} = dataObjs(i).DisplayName;

[MementoMori]

It doesn't work also fixing that problem. Moreover I have a matrix in fig file

[Walter Roberson]

for i=1:length(dataObjs)
    if isprop(dataObjs(i), 'DisplayName')
        legend_name{i,1} = dataObjs(i).DisplayName;
    else
        legend_name{i,1} = sprintf('%s: #%d', classname(dataObjs(i)), i);
    end
    yval        = dataObjs(i).YData;
    Ymat = [Ymat yval(:)]; % Keep appending column vectors
end

[MementoMori]

@Walter Roberson thank you. It gives me this error by the way

Undefined function 'classname' for input arguments of type 'matlab.graphics.primitive.Image'.

Error in extract_data_from_figures (line 22)
legend_name{i,1} = sprintf('%s: #%d', classname(dataObjs(i)), i);

Error in NuovaDisposizione (line 295)
data=extract_data_from_figures(filename);