Programmer Guide/Command Reference/EVAL/ncol: Difference between revisions
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{{DISPLAYTITLE: | {{DISPLAYTITLE:ncol (alias: cols)}} | ||
Returns the number of columns of the argument <var>x</var>. | Returns the number of columns of the argument <var>x</var>. | ||
;Usage: <code>ncol(<var>x</var>)</code> | |||
;Result: The result of this function is the number of columns of <var>x</var>. If <var>x</var> is a scalar or a vector, the result is '''1'''. | |||
;See also: [[../nrow|nrow]] | |||
[[../#Functions|<function list>]] | |||
Example: | |||
<pre> | <pre> | ||
#matrix := eval init(100,10,0) | #matrix := eval init(100,10,0) | ||
conlog 'number of columns of $#matrix: $(eval ncol($#matrix)' | conlog 'number of columns of $#matrix: $(eval ncol($#matrix))' | ||
// the attribute !ncol returns the same value: | // the attribute !ncol returns the same value: | ||
conlog 'number of columns of $#matrix: $#matrix[!ncol]' | conlog 'number of columns of $#matrix: $#matrix[!ncol]' | ||
</pre> | </pre> | ||
Latest revision as of 11:25, 21 April 2011
Returns the number of columns of the argument x.
- Usage
ncol(x)- Result
- The result of this function is the number of columns of x. If x is a scalar or a vector, the result is 1.
- See also
- nrow
Example:
#matrix := eval init(100,10,0) conlog 'number of columns of $#matrix: $(eval ncol($#matrix))' // the attribute !ncol returns the same value: conlog 'number of columns of $#matrix: $#matrix[!ncol]'
