Replace char with other and count total numbers

Hello, I need some help.

1. I want to replace in string all the \n with whitespaces. I have already tried strrep(temp_str,'\n',' '); but it doesn't work!!

2. I want to count the number of zeros and ones in cells. For instance at the upper image i want as result number_of_zeros=3

number_of_ones=12

is there and way to do this?

Answer 1

[pfb]

I do not see the relevance of strings or newline chars.

What is the object you're showing? What is the result of

 whos x

where x is the object you represent graphically? If you could concatenate all of the vectors in "column" 2 into a single vector, say y, then the number of ones would be O=sum(y) and the number of zeros Z = length(y)-O.

[pfb]

I'm not sure whether you have a cell with 2 columns... I do not use that graphical inspector.

Assuming it is a cell with 2 columns, and it is called x , try

 O = sum(cell2mat(x(:,2)'));
 Z = length(cell2mat(x(:,2)'))-O;

[xaroula mav]

Thanks a lot pfb it works!

[Image Analyst]

Go ahead and mark the answer as "Accepted" so he/she gets reputation points.

Answer 2

[tdd4c1]

1. this example might help you with your whitespace problem

str = 'hello\nworld';
formattedStr = sprintf(str)
newlineChar = sprintf('\n');
strrep(formattedStr,newlineChar,' ')

2. you can get number of zeros and ones by the following:

if your variable is x, then

number_of_ones  = sum([x{:,2}]);
number_of_zeros = length([x{:,2}]) - number_of_ones;

[xaroula mav]

As about the number_of_ones and zeros i try what you suggested me but it doesn't work. It shows me the message "Undefined function 'sum' for input arguments of type 'cell' " Thanks a lot

[tdd4c1]

It appears that you are working with cell arrays. Make sure you use the curly braces and square brackets (not parens) when executing this code (e.g. [x{:,2}]). If this still doesn't work, post how you construct your data array.

[xaroula mav]

thanks a lot it works

Answer 3

[xaroula mav]

As about the other question i have this variable which is depicted above. And i want to replace all the \n with whitespaces. Furthermore i want to convert it in cell array, is it possible? i looked everywhere but i found nothing. Thanks in advance

Answer 4

[pfb]

What do you exactly mean by "this variable which is depicted above" and where would the \n be?

I think tdd4c1 answered to your question about the newline above. Doesn't it work?

As to converting a string to char, I think it's enough to enclose it in braces

 cell_a = {a}

[xaroula mav]

sorry, I forgot to insert the image. No it didn't work what tdd4c1 suggested me.

[pfb]

oh, ok... maybe attaching the mat file containing the char variable instead of its graphical representation would be more helpful in pinpointing the problem.

Even better would be a small portion of the variable that sufficient to exemplify the problem (a minimal example, that is).