[Scilab-users] I have problem to plot a graph of the trigonometric function.

[Pierre-Aimé Agnel]

Hi,

You should use the element-wise multiplication .*instead of the matrix 
multiplication * in your function f = x * sin(x)
You also had a missing property "color" in the function title (and I 
modified your xdata to be between -5 and 5)

// Close all opened figures and clear workspace
//xdel(winsid());
clear;
clc;

function f=myfunction(x)
f = x.*sin(x)
endfunction

// Plot
scf(1);
clf(1);

xdata = linspace ( -5 , 5 , 100 );
ydata = myfunction ( xdata );
plot ( xdata , ydata );
xlabel("$-5\le x\le 5$","fontsize",4,"color","red");
ylabel("y = x . sin(x)","fontsize",4,"color","red");
title("Function","color", "red","fontsize",4);
legend("Function evaluation");

Best

On 06/23/2014 10:56 PM, Reinaldo wrote:
> Hi Scilab users,
>
> I have a problem to plot a graph of the trigonometric function, as 
> follows:
>
> // Close all opened figures and clear workspace
> //xdel(winsid());
> clear;
> clc;
>
> function  f=myfunction(x)
> f  =  x*sin(x)
> endfunction
>
> // Plot
> scf(1);
> clf(1);
>
> xdata=  linspace  (  -10  ,10  ,100  );
> ydata=  myfunction  (  xdata);
> plot  (  xdata , ydata);
> xlabel("$-5\le x\le 5$","fontsize",4,"color","red");
> ylabel("y = x . sin(x)","fontsize",4,"color","red");
> title("Function","red","fontsize",4);
> legend("Function evaluation");
> Could someone tell me what's wrong?
> Thank you in advance.
> All best,
> Reinaldo.
>
>
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-- 
Pierre-Aimé Agnel
Development Team
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