Subversion Repositories wimsdev

:Data and list manipulation

:Function,Example,Effect

:items( )

items(a,b,c,d,e,f)

the number of items (here it's 6) in the list {a,b,c,d,e,f}

:item( )

item(3,a,b,c,d,e,f)

item number 3 of the list {a,b,c,d,e,f} (hence c) ; <tt>item(3,\ll)</tt> is the item number 3 of the list \ll (same as <tt>\ll[3]</tt>)

:item( .. , )

item(2..5,a,b,c,d,e,f)

items number 2 to 5 of the list {a,b,c,d,e,f} (hence b,c,d,e)

:item([ , ], )

item([2,4],\ll)

items number 2 and 4 of the list \ll (same as <tt>\ll[2,4]</tt>)

:position( )

position(make,do,go,make,take)

number of position of the item `make' in the list {do,go,make,take} (hence 3)

:rows( )

rows(\m)

the number of rows in the matrix \m

:row( , )

row(2,\m)

row number 2 of the matrix \m (same as <tt>\m[2;]</tt>)

:row( .. , )

row(2..5,\m)

the submatrix of \m consisting of rows number 2 to 5 (same as <tt>\m[2..5;]</tt>)

:row([ , ], )

row([1,3],1,2,3<br>3,4,5<br>5,6,7) 

the submatrix of the 3×3 matrix consisting of the first  and the last rows

:row(   , )

row(column 1 > 1 and column 2 = good,\mat)

the submatrix of \mat consisting of rows where column 1 is > 1 and column 2 is the word `good'

:randomitem( )

randomitem(\list)

a random item of (comma-separated) \list.

:randomrow( )

randomrow(\mat)

a random row of the matrix \mat.

:column( , )

column(2,\m)

items of column number 2 of the matrix \m, as a comma-separated list (same as <tt>\m[;2]</tt>)

:column( .. , )

column(2..5,\m)

the submatrix of \m consisting of columns number 2 to 5 (same as <tt>\m[;2..5]</tt>)

:column([ , ], )

column([1,3],1,2,3<br>3,4,5<br>5,6,7)

the submatrix of the 3×3 matrix consisting of the first  and the last columns

:asis( )

asis(How do you do? item(1,2,3))

the string as it is, protected from transformations and conditionality.

:htmlmath( )

htmlmath(2*x^2+3*x)

the best possible way to render the expressionin html way: 2x<sup>2</sup>+3x

:texmath( )

texmath(2*x^2+3*x)

the TeX source of the expression