Working with fileDatastore and loading its data

Hi,

I have a large files in Current file which I need to work with. These files are named D2_boneName.mat and contains doubles in only one row.

I would like to load each file and find the minimal and maximal number from each and finally count the histogram.

My script is this and the error is "Unable to use a value of type 'struct' as an index. Error in vypocti_cetnosti (line 10) maxK(i) = max(kost);"

Can you help me, how to rewrite it to work correctly?

fds = fileDatastore('D2_*.mat','ReadFcn',@load);
i = 1;           
min=0;
max=0;

while hasdata(fds)
	[kost,info] = read(fds);
    
    maxK(i) = max(kost);
    minK(i) = min(kost);
     
	i = i+1;
end

dilek = (max(maxK)-min(minK))/50;
deleni = min(minK):dilek:max(maxK);

i=1;
while hasdata(fds)
	[T_A,info] = read(fds); 
	kost = T_A{:,:};
    
    [cetnostiObjemu,krajeObjemu]=histcounts(kost,deleni);
    cetnostiObjemu=cetnostiObjemu/size(kost,2);
   
    [~,fname] = fileparts(info.Filename);
 	save(['cetnosti_' fname], 'cetnostiObsahu')
	i = i+1;
end

Answer 1

[Cris LaPierre]

What is the name of the variable you are loading? That is a fieldname in the structure kost. You access it using dot notation:

max(kost.Var)

See this example on the documentation page for load.