Problem with appending to assignin

Hi,

I have this line of code:

assignin('base',char(regexprep(TXTFilenameMAINTENANCE(j,1),'[^\w'']','')),polyfit (X,Y,1));

which is inside a loop

Which puts the polyfit of X & Y into a variable called 'Ballast_Renewal', this line works perfectly for the first iteration in the loop. For the following iterations it just keeps overwriting the first row in the variable 'Ballast_Renewal'.

my knowledge of appending to a Matlab variable are limited to the basic methods: x(end+1)=2; x=[x; 2];

Non of which I can get to work for my particular problem, anyone know why?

Thanks in advance

Answer 1

[Walter Roberson]

Ouch!

Please consider using dynamic structure field names instead.

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

[Matt]

Hi, thanks for the tip. I'm newish to matlab and didn't know about structures.

I've tried this:

A(j,1) = regexprep(TXTFilenameMAINTENANCE(j,1),'[\W'',\d]','')

s.(A{j,1}) = polyfit (X,Y,1)

But I want to append each time, i've tried something like this and i get the following error:

??? s.(A{j,1} =[A{j,1}; polyfit (X,Y,1)]

|

Error: The expression to the left of the equals sign is not a valid target for an assignment.

any ideas?

Answer 2

[Matt]

Solved:

A(j,1) = regexprep(TXTFilenameMAINTENANCE(j,1),'[\W'',\d]','') s.(A{j,1}) = polyfit (X,Y,1)

then to append:

s.(A{j,1}) =[s.(A{j,1}); polyfit(X,Y,1)]