cell part not saved using '-struct' option
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Hi:
I have a structure variable 'ImaInfo' like below:
then I saved it into disk using '-struct' option, using command:
save('test.mat','-struct','ImaInfo')
but the variable data in the struction ('ImaInfo.data') is not saved in the 'test.mat' file, as shown below:
just want know if there is any mistake with my operation? or 'cell' type is not allow to save in '-struct' option?
Thanks!
Yu
10 个评论
Walter Roberson
2019-5-21
In my quick test in R2019a, all three fields show up for me.
Yu Li
2019-5-21
Steven Lord
2019-5-21
Did you receive any warning message when you tried saving the struct array? If so what is the full text of that warning (all the text displayed in orange?)
Are you certain you're using the built-in save function? What does this return?
which -all save
What type of data is stored inside the cell array named data?
Walter Roberson
2019-5-21
Is it possible that the data field contained over 1 gigabyte ?
Hi Steven:
there is no warning.
below is the result of which -all save:
>> which -all save
built-in (/apps/matlab/R2018b/toolbox/matlab/general/save)
save is a Java method % com.mathworks.services.Prefs method
/apps/matlab/R2018b/toolbox/matlab/codetools/+matlab/+desktop/+editor/@Document/Document.m % matlab.desktop.editor.Document method
save is a Java method % com.mathworks.mde.editor.MatlabEditor method
save is a Java method % com.mathworks.matlab.api.editor.Editor method
/apps/matlab/R2018b/toolbox/matlab/appdesigner/appdesigner/+appdesigner/+internal/+model/AppModel.m % appdesigner.internal.model.AppModel method
/apps/matlab/R2018b/toolbox/matlab/winfun/@COM/save.m % COM method
/apps/matlab/R2018b/toolbox/simulink/simulink/@slxPackager/save.p % slxPackager method
/apps/matlab/R2018b/toolbox/sl3d/sl3d/@vrworld/save.m % vrworld method
the data inside the 'ImaInfo.data' is 'unit8' matrix which obtained from 'imread':
Hi Walter:
the file is very large: ~700Mb.
Thanks!
Yu
Walter Roberson
2019-5-22
The cell array contains more than 4 gigabytes and so needs the -v7.3 flag to save
Yu Li
2019-5-22
Walter Roberson
2019-5-22
The limitation is not on the compressed size of the data: it is on the raw size of the data including the uncompressed headers.
Yu Li
2019-5-22
Walter Roberson
2019-5-22
V7.3 is not a compression specification. V7.3 uses a completely different internal format for data that is able to hold large variables where the old format included size counters that were limited to 1 gigabytes.
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