Plot the function error

[Abdul Rahman Riza]

Dear All,

I am using octave 3.2.2 and trying to plot a simple function from specific range where x between 0 to 26

octave3.2:1> x = 0:0.1:26;
octave3.2:2> plot (x, 1:((206:x)+5.2+1.7*x));
error: operator +: nonconformant arguments (op1 is 1x0, op2 is 1x261)
error: invalid limit value in colon _expression_
error: evaluating argument list element number 2
error: evaluating argument list element number 1

where did i went wrong?

then how to find maxima or minima?

Regards,
Riza