error using saveas in fig format

Hellow Dear,

I tried to save a figure using saveas in fig format and I got several error messages. Saving the same figure in other format such as jpg is fine.

% plot
              for page = 1: num_page

                  if ci_end(page) > numel(screened_contact)
                      ci_end(page) = numel(screened_contact);
                  end

                  figure(page), clf
                  sgtitle(' Compare orig vs interpolated stim artifact in data pre-processing')
                  pageF = nrow_subp*ncol_subp*(page -1);    % factor to compensate subplot# after page1

                  for ci = ci_begin(page) : ci_end(page)

                      subplot(nrow_subp, ncol_subp, ci-pageF), hold on

                      %grayColor = [.7 .7 .7];
                      plot(timevec, ref_EP(ci, :), 'k', "LineWidth", 1)
                      plot(timevec, prepro_EP(ci, :), 'r', "LineWidth", 1)
                      title( strjoin([num2str(ci) ', C' num2str(screened_contact(ci)) ', ' region(ci) ', ' region_abbrev(ci)]) )

                      plot([0 0], get(gca,'ylim'), 'k--', 'linewidth',1)
                      plot(get(gca,'xlim') ,[0 0], 'k--','linewidth', 1)
                      %yvalue = max([max(abs(ref_EP(ci,[1:900]))) max(abs(prepro_EP(ci,[1:900]))) ]);
                      %set(gca, 'ylim', [-1 1]* (yvalue+20))
                      %set(gca,'xtick',[-0.1 0 0.2 0.4])
                      %set(gca, 'xticklabels', [-0.1 0 0.2 0.4])
                      set(gca, 'xlim', [-0.1 0.4])
                  end
              
                 set(gcf, 'Position', get(0, 'Screensize'));
                 saveas(figure(1), [ char(output(1,:)) '\preprocessed_vs_ref_con' num2str(ci_begin(page)) '_to_' num2str(ci_end(page)) '.fig' ])
                 saveas(figure(1), [ char(output(1,:)) '\preprocessed_vs_ref_con' num2str(ci_begin(page)) '_to_' num2str(ci_end(page)) '.jpg' ])

                 close(1)
              end
      

Answer 1

[Walter Roberson]

Notice the error is shown as being on line 14 of savefig

Line 14 of the Mathworks supplied savefig gor R2022b is

%  savefig(H,FILENAME,'compact') saves the figures identified by the graphics 

So your problem is that you have a third-party savefig.m that is interfering with using saveas()

[ET]

Thanks, Walter, I think the error is at: matlab.graphics.axis.Axes/set

where FontSize of class 'Axes' with at least value is not a scalar

I can get to property of matlab.graphics.axis.Axes, but wonder how I can check the values of FontSize of class 'Axes'

[DGM]

The error is not in the builtin axes class. It's in whatever file you named savefig.m, which is trying to take some unknown set of inputs and apply them in some unknown fashion to an axes object.

We can't see that file, so we don't know how it's mishandling the arguments it's given when called incorrectly.

Find the offending file and rename it so that it stops causing the problem.

which savefig -all % look for the file

/MATLAB/toolbox/matlab/graphics/objectsystem/savefig.m

If there is some other user created file called savefig.m, rename it.

[ET]

Thanks, DGM

There are 3 diff savefig.m in 3 diff locations. After renaming 2 of them, the problem with saveas is gone.

>> which savefig -all
\MATLAB\Standford_script\Jeff_scripts\dannyGenScripts\ARTISTCode\savefig.m
\MATLAB\fieldtrip-20230215\external\lagextraction\savefig.m                 % Shadowed
\MATLAB\R2022b\toolbox\matlab\graphics\objectsystem\savefig.m                       % Shadowed