unable to save a figure in for loop

Hello,

I've created a geoplot figure and I need to take some zoomed in screenshots of the figure. I've created the following code to do so:

for i =0:35

minlat=40.4+i*(1/60);

maxlat=40.4+(i+1)*(1/60);

latcent=(minlat+maxlat)/2;

latname=replace(num2str(latcent),".","_");

for j=0:26

minlong=-75.9+j*(2/60);

maxlong=-75.9+(j+1)*(2/60);

longcent=(maxlong+minlong)/2;

longname=replace(num2str(longcent),".","_");

geolimits([minlat,maxlat],[minlong,maxlong]);

%drawnow

%mainfigure=get(1);

figname=["Figures\",latname,",",longname,'.svg'];

%disp("asdf")

print(gcf,'-vector','-dsvg',figname);

%disp("asdfasdf")

end

end

When I run this code, I keep getting the following error with no .svg files created:

Error using checkArgsForHandleToPrint

Invalid graphics object.

Error in checkArgsForHandleToPrint

Error in print>LocalCreatePrintJob (line 108)

handles = checkArgsForHandleToPrint(0, varargin{:});

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in print (line 38)

[pj, inputargs] = LocalCreatePrintJob(varargin{:});

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Error in LV_Dev (line 798)

print('-f1','-vector','-dsvg',figname);

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

which is really weird because if i just do the final print statement in the command prompt on its own, I get the screenshot I need. For whatever reason, it seems like matlab can't get or set a figure while in a for loop. I've commented out some of my other attempts to get this to work.

I really don't want to do this manually so any help would be appreciated.

Thanks

[Stephen23]

The line of code shown in the error message

print('-f1','-vector','-dsvg',figname);

is not present in the code you have quoted above.

[Alan]

oh ya sorry, that was another attempt at getting this to work. Regardless of what I put as the first argument in print, it comes up with this error

Answer 1

[Cris LaPierre]

I think the issue is with how you are building figname.

i =0;
minlat=40.4+i*(1/60);
maxlat=40.4+(i+1)*(1/60);
latcent=(minlat+maxlat)/2;
latname=replace(num2str(latcent),".","_");

j=0;
minlong=-75.9+j*(2/60);
maxlong=-75.9+(j+1)*(2/60);
longcent=(maxlong+minlong)/2;
longname=replace(num2str(longcent),".","_");
       
figname=["Figures\",latname,",",longname,'.svg']

figname = 1x5 string array
    "Figures\"    "40_4083"    ","    "-75_8833"    ".svg"

MATLAB is interpretting that as 5 separate items, which get treated as 5 separate inputs to your function. I would construct figname using the following

figname = "Figures\" + latname + "," + longname + ".svg"

figname = "Figures\40_4083,-75_8833.svg"

However, if saveas is already working, then I don't see a reason to make it work using print.

[Stephen23]

Or using FULLFILE:

figname = fullfile("Figures", latname + "," + longname + ".svg");

Answer 2

[Alan]

For whatever reason, matlab didnt like using the print function for this application, but this worked perfectly fine when i changed the print to saveas:

saveas(gcf,figname,'svg')

I assume this has something to do with how print works in the command window vs in actual code, but I'm not sure and this was sure confusing