replce all hyphens(-) in .txt file with 0

Hi

I am having numeric data in the form of 10*8 array in .txt file. The data is having 2 rows of hyphens which are causing problem in reading this data. I want to raplace hyphen(-) with zero (0).

Again one thing as data is having negative numbers also, so we have to replace -,(hyphen followed by comma which is delimiter) with 0, sothat negative numbers will remain intact.

So how can I do this replacement? Something like 'regexprep'.. but I want to replace all hyphens in .txt file.

Thanks in advance.

[Fangjun Jiang]

Provide an example and then we can start from there.

[Walter Roberson]

To cross-check: the hyphen-comma should be replaced by zero-comma ?

[Nikhil CD]

@ Walter: yes you are absolutely right..

Answer 1

[Grzegorz Knor]

Suppose that you have test file:

1.0-, 2.0
1.2-, -2.3
-1.4-, 2.6

code:

fid1 = fopen('test','r');
fid2 = fopen('test_copy','w');
tline = fgetl(fid1);
while ischar(tline)
tline = strrep(tline,'-,','0,');
fprintf(fid2,'%s\n',tline);       
tline = fgetl(fid1);
end
fclose(fid1);
fclose(fid2);

[Nikhil CD]

Thanks for response.

But my data is not like you have taken. My data looks like

1, 2.3, 37, -, -4, 2

2, -1.7, -, -, 25, 6

3, -12, -, -, -5.4, 2

[Nikhil CD]

After some modification your code works perfectly well for my need..

Thank you.