Working with fileDatastore and loading its data

Question

Anezka Koterova 2020-9-19

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/596473-working-with-filedatastore-and-loading-its-data

编辑： Cris LaPierre 2020-9-26

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