Text and Strings
abs 	convert string to ASCII values
eval 	evaluate text macro
num2str 	convert number to string
int2str 	convert integer to string
setstr 	set flag indicating matrix is a string
sprintf 	convert number to string
isstr 	detect string variables
strcomp 	compare string variables
hex2num 	convert hex string to number
>>help ...?
For example for displaying all function for sparse matrix was:
>>help sparfun
Also conversions like:
hex2num,dec2bin,bin2dec what i must use in command window to display also these?
>>help ...?
I wait your response!
lookfor string
lookfor text
lookfor convert
also 
docsearch string
docsearch text
etc....
just a note
- while it works, ABS is not the (preferred) way to convert char strings to ASCII values
- it works because it - silently - does the DOUBLE conversion for you (see below)
% rather, use proper typecasting...
     s='abc'
     v=double(s)
     v=int16(s)
% and so on
% see also:
     help datatypes;
us
a hint:
     lookfor convert;
     docsearch convert;     % then sort according to product...
     docsearch conversion;
us
Thank you very much us!