Large MATLAB Figure (>1 GB)

I have MATLAB Figures of size 1.1 GB. The reason is the simulaiton sample time is 10ns, and data type is double (64 bit) in Xilinx HLS Blocks. This is just for 0.3 seconds time for a figure with only one waveform.

On saving this figure as an image after editing, the image file size exceeds 100 MB! I tried saving as svg image for reduced umage size, and included in MS Word. But, the picture had default mesh areas in it. On editing these meshes in Inkscape, the waveform within the mesh area also got deleted.

Extracted the x-axis and y-axis data tor reduce the data points for plotting sake. But, each data is a 1x20000001 array, and MATLAB doesn't open this large mat file!

Writing to xlsx file also didn't work - "The specified data range is invalid or too large to write to the specified file format. Try writing to an XLSX file and use Excel A1 notation for the range argument, for example, ‘A1:D4’." I don't understand what this means.

I've no idea how to view this large data or extract data every 1000 samples of x-axis (would correspond to 10e-6 resolution, which should be okay). I need to keep the simulation sampling time as 10ns, because the signals in the code require that resolution. Please help.

[Adam Danz]

Knowing what's in the figure would be helpful and how those graphics objects are generated. For example, are you generating objects in a loop?

[Walter Roberson]

But, each data is a 1x20000001 array, and MATLAB doesn't open this large mat file!

Make sure that file is saved with -v7.3 option .

The specified data range is invalid or too large to write to the specified file format.

Excel has a limit of = 1048576 rows and 16384 columns.

If you had to save it as a .xlsx file you could write out rows of up to 16384 columns, which would need about 1221 such rows (you would probably use different sheets for the two variables.) But be warned that appending data to a .xlsx file that big would start to get pretty slow.

[Walter Roberson]

It is never been clear to me whether setting the save() preferences to use -v7.3 files by default will affect the use of savefig() . .fig files are specially structured .mat files, so... maybe??

But if not, then if you have a figure handle in a variable, then in theory you can save() -v7.3 the handle into a .mat file

[SUHANYA M S]

I'm using the "Print to Figure" option in Simulink Scope. I've used this option before for longer simulation times, but larger sampling time (>10 uS).

This issue cropped up when using 10 ns sampling time.

@Walter Roberson "Make sure that file is saved with -v7.3 option ."

How can I do this from the Scope?

@Adam Danz I'm implementing a PLL for grid synchronisation using Xilinx HLS blocks in Simulink. The waveforms are primarily sinusoidal waveforms, phase angle, frequency, etc.

@Walter Roberson "If you had to save it as a .xlsx file you could....."

It's not neccessary to use an excel file. The aim is to reduce the final image size with atleast 300 or 600 dpi resolution. Any solution is fine.

Answer 1

[mark palmer]

One obvious option is to break the image into segments and save each segment separately, then combine later on.

[SUHANYA M S]

I'm using the "Print to Figure" option in Simulink Scope. How can I break the image into several segments in MATLAB Figure and then combine later on?