[SOLVED] Matlab error :??? Index exceeds matrix dimensions.

hi the particular code

is


%%%%%%%%%
r=randint(1,d,range);
temp=dec2hex(r',(w/4))

for i=1:d-1;
fid(fid,'%d,\n',temp(1:2 ,i));//error reported here
end


error message

??? Index exceeds matrix dimensions.

Error in ==> coe_script at 19
fid(fid,'%d,\n',temp(1:2 ,i));

the initial matrix r is single dimension array which has length on x = range and on y = 1.

the temp is transpositioned (because you use r') compared to r so it has length on x = 1 and on y = range.

Trying to access element x=2 and with some Y on temp will rise error.

But fid(fid,'%d,\n',temp(1 ,i)); should be OK

luben111 said:

the initial matrix r is single dimension array which has length on x = range and on y = 1.

the temp is transpositioned (because you use r') compared to r so it has length on x = 1 and on y = range.

Trying to access element x=2 and with some Y on temp will rise error.

But fid(fid,'%d,\n',temp(1 ,i)); should be OK

Click to expand...

the full program is

////////////////////////////////////////////////////////////////////////////////////

%Script to generate a .coe file for memory initialisation
clc
fid=fopen('mem.coe','wt');
x=0;
fprintf(fid,' %b',x);
d=input('Please enter depth of memory ');
w=input('Please enter the width of memory ');
range=power(2,w);
r=randint(1,d,range);
temp=dec2hex(r',(w/4));
fprintf(fid,';The data memory generated is ');
fprintf(fid,'MEMORY_INITIALIZATION_RADIX=16; ');
fprintf(fid,'MEMORY_INITIALIZATION_VECTOR= ');
d=d-2;
display('temporary-Assignment')
size(temp)
temp
for i=1:d-1;
fid(fid,'%d,\n',temp(1,i));
end
fprintf(fid,';');
fclose(fid);
///////////////////////////////////////////////

when run the ouput is


Please enter depth of memory 10
Please enter the width of memory 8
temporary-Assignment

ans =

10 2


temp =

1E
73
B7
E4
45
41
DD
3B
CE
E8

??? Index exceeds matrix dimensions.

Error in ==> coe_script at 19
fid(fid,'%d,\n',temp(1,i));

what is the "fid" function? You might want to use "fprintf"
Moreover, you should be saving "temp(1," instead of "temp(1,i)", using "%x" instead of "%d".

Perfect fix and the program is working ....

---------- Post added at 23:01 ---------- Previous post was at 22:49 ----------

The program is producing correct output matlab command Window but in the file produced the output is in decimal format and the number of elements is more than expected how to fix the issue

Ooops, my mistake, you should use "%s" in the output formatting.