Extraction of individual matrix from cell array

I want to extract all the matrix in cell array as individual matrix in my workspace

MT1=Microtrips{1,1}

MT2=Microtrips{1,2}......

MTn=Microtrips{1,n}

Plz find attached mat file

help me out with the code

[Stephen23]

@Praveen Kumar Ramani: you have a perfectly good cell array, from which you can trivlally access any cell's contents by using efficient indexing. And you want to replace your simple and efficient indexing by awkwardly forcing meta-data (your index) into variable names.

Dynamically defining or accessing variables names is is one way that beginners force themselves into writing slow, complex, obfuscated, buggy, hard-to-debug code. Read this to know why:

https://www.mathworks.com/matlabcentral/answers/304528-tutorial-why-variables-should-not-be-named-dynamically-eval

Can you tell us why you need to do this? What possibly operation are you trying to perform, that is impossible to perform using simple efficient indexing of your cell array? Why do you need to force yourself into writing slower, more complex code than what you have now?

[Praveen Kumar Ramani]

1) i want to check matix if all three columns has zero entry i need to delete the entry

2) i want to pass each array element to certaim function as input

[Stephen23]

@Praveen Kumar Ramani: both of those will be much simpler with indexing. Do you have any relevant reason why you need to force yourself into writing slow, complex, buggy code?

[Guillaume]

Gah! You've already asked this question, been told not to do that and shown how to use your cell array efficiently. So wy do you persist?

Of course, now that you've been shown a way to do it you've accepted it. Except as you've been told repeatedly, it makes your life harder not easier. Sure enough, as predicted, your next question is how do I use all these variables that I've pointless created. Well, you can't easily because you've done exactly what we told you not to do.

If you don't listen to our advice why should we bother answering you.

Answer 1

[KSSV]

Praveen Kumar Ramani it is a bad idea to save each cell into individual matrix.....infact you need not to do it. It is waste of memory and waste of time. Already you have your information in hand in a proper and neat way. You can extract any value you want using :

for i = 1:length(Microtrips)
iwant =      Microtrips{i} 
end

[Praveen Kumar Ramani]

i used your function but i will be able to get only last cell of array as an matix,

i want each and every cell as separate matrix

[KSSV]

Ohhh....no, if you want third cell from Microtrips use

Microtrips{3}

If you want first use:

Microtrips{1}

You have access to every matrix you want already.....there is no requirement to save it into individual matrix again.

[Praveen Kumar Ramani]

i want all cell as individual from 1 to n

[KSSV]

YOu have that already in hand....

for i = 1:length(Microtrips)
Microtrips{i} 
end

Answer 2

[Mundrathi Venugopal]

After loading the mat file,I guess you would probably wanna do this.

for i=1:numel(Microtrips),eval(['MT' num2str(x)  ' =  Microtrips{' num2str(x) '};']);end

However, Many common uses of the eval function are less efficient and are more difficult to read and debug than other MATLAB functions and language constructs.

[KSSV]

It is not suggested to use eval.

[Stephen23]

"...I guess you would probably wanna do this."

Or you could read the MATLAB documentation, which states "A frequent use of the eval function is to create sets of variables such as A1, A2, ..., An, but this approach does not use the array processing power of MATLAB and is not recommended. The preferred method is to store related data in a single array".

Good luck with your pointlessly slow, pointlessly complex code!