how to use axis ?

hello, i want to know how to use "axis" to choose the points where i want to have my curve

i have this function whose plotted at points -200 to 200 when i tried

axis([-0.3 0.3 -40 40]) it shows

Subscript indices must either be real positive integers or logical.

so what should i do to get my function at the interval [-0.3 0.3 -40 40]?

Answer 1

[Guillaume]

"when i tried axis([-0.3 0.3 -40 40]) it shows Subscript indices must either be real positive integers or logical"

That error messages means you're trying to index a variable. The most common cause of this error is that you have a variable called axis which shadows the axis function. The solution is to rename that variable to something that is not a function name.

[Aiachi Hiba]

thanks, it was just as you said but now i got another error it said

Error using axis>LocSetLimits (line 234) Vector must have 4, 6, or 8 elements.

Error in axis (line 94) LocSetLimits(ax(j),cur_arg);

Error in nonlin (line 47) axis([-0,3 0.3 -40 40]);

what does it mean ? and Thanks in advance

[Aiachi Hiba]

i already found the answer, thanks for your help.