Editing Scilab (section)

== Syntax ==
Scilab syntax is largely based on the MATLAB language. The simplest way to execute Scilab code is to type it in at the [[command-line interface|prompt]], <code>--> </code>, in the graphical command window. In this way, Scilab can be used as an interactive mathematical [[command line interpreter|shell]].

[[Hello World!]] in Scilab:
<syntaxhighlight lang="scilab">
disp('Hello World');
</syntaxhighlight>

Plotting a 3D surface function:
<syntaxhighlight lang="scilab">
// A simple plot of z = f(x,y)
t=[0:0.3:2*%pi]';
z=sin(t)*cos(t');
plot3d(t,t',z)
</syntaxhighlight>

Determining the equivalent single index corresponding to a given set of subscript values:<ref>{{github|https://github.com/pygments/pygments/blob/master/tests/examplefiles/scilab/scilab.sci|pygments/tests/examplefiles/scilab/scilab.sci}}</ref>
<syntaxhighlight lang="scilab">
function I=sub2ind(dims,varargin) 
//I = sub2ind(dims,i1,i2,..) returns the linear index equivalent to the
//row,  column, ... subscripts in the arrays i1,i2,..  for an matrix of
//size dims.
 
//I = sub2ind(dims,Mi) returns the linear index
//equivalent to the n subscripts in the columns of the matrix Mi for a matrix
//of size dims.
 
  d=[1;cumprod(matrix(dims(1:$-1),-1,1))]
  for i=1:size(varargin)
    if varargin(i)==[] then I=[],return,end
  end

  if size(varargin)==1 then //subindices are the columns of the argument
    I=(varargin(1)-1)*d+1
  else //subindices are given as separated arguments
    I=1
    for i=1:size(varargin)
      I=I+(varargin(i)-1)*d(i)
    end
  end
endfunction
</syntaxhighlight>