Save data in jpg format in special folder

Hello.

I wanted to make imagedatastore from .mat file.,(it consist of 1x1 struct:Data with 150x10000double and Labels with 150x1cell.)

My target was save figures in special format(for example, .j,pg, 224x224pixel) in special folder. Actually there are 3 subfolder(name of 3 category).

So i tried codes like this

load(fullfile(tempdir,'ECG','Data.mat')
parentDir = tempdir 
dataDir = 'data'
imageRoot = fullfile(parentDir,)dataDir;
data = Data.Data
labels = Data.Labels
r = size(data,1)
for i = 1:r
    cfs = abs(data(i,1:1000)
    im = ind2rgb(im2uint8(rescale())cfs,jet(128))
    imgLoc= fullfile(imageroot,char(labels()))i
    imFileName= strcat(char(labels(i)),'_',num2str()i,''jpg)
    imwrite(imresize(im,[224 224],fullfile(imgLoc,))
end
imFileName

[khadicha amonova]

Furthermore, at the beginning I wanted to use plot and saveas function. But unfortunately There no possiblity to save in special folder automatically in saveas funtion.

At the result I used abow mentioned code and I get jpg files with terrible images! They look very strange! ?

only one things makes me happy that they are located in proper folders!,?

How I can plot my signal (there are150 signal data in one .mat file) and save them in proper folder automatically!

Please help me