Why different size on 2 files?

I have 2 files, which has been created with same fil. But the size are very different. Why this different?

Answer 1

[madhan ravi]

see https://in.mathworks.com/matlabcentral/answers/97955-why-do-mat-files-for-variables-of-the-same-size-occupy-different-amount-of-disk-space answer given by mathworks support team

[Rasmus Chrisander]

Thx. I'll look in to it.

[Rasmus Chrisander]

Is it possible to see what data type the variables are saved as and how many bites they are?

[madhan ravi]

yes of course

type in command window

whos yourvariable %variable which you want to see the data type

[madhan ravi]

for example:

>> a=1

a =

       1

>> whos a
  Name      Size            Bytes  Class     Attributes

    a         1x1                 8  double              

>>

[Rasmus Chrisander]

Thx. If I do this for the different variables in the two files. It seems like the variables have the same size. ?

if true
Dat18  size  bytes  size of 1 variable  class        
dato  17615  140920  8  double  File size: 14,8 mb      
files  17615  3376212  191,6668748  cell        
mappe  17615  2254720  128  cell        
tog  17615  140920  8  double        
                
Dat2017                
dato  24454  195632  8  double  File size: 206 kb      
files  24454  4688868  191,7423734  cell        
mappe  24454  3130112  128  cell        
tog  24454  195632  8  double        

    % code
  end

[madhan ravi]

no they are not the same size

[madhan ravi]

but the bytes are different

[Rasmus Chrisander]

If I look at the bytes Dat2017 should be bigger than Dat18. But it isn't. So why is Dat18 so much bigger?

[madhan ravi]

To be frank I agree your point , did you read that link completely?

[Rasmus Chrisander]

I'm working on it. :)

Answer 2

[Rasmus Chrisander]

I used the function save.

: save(strcat(datainfo,year,'.mat'), 'fil', 'tog', 'dato', 'mappe')