[Scilab-users] grayplot

[Rafael Guerra]

Hi Samuel,

It looks brilliant J

Thanks and regards,
Rafael

From: users [mailto:users-bounces at lists.scilab.org] On Behalf Of Samuel Gougeon
Sent: Thursday, October 27, 2016 8:15 PM
To: Users mailing list for Scilab <users at lists.scilab.org>
Subject: Re: [Scilab-users] grayplot

Le 27/10/2016 18:50, Rafael Guerra a écrit :

Hi Samuel,



Scilab-6  'scatter' plot function seems indeed quite adequate for these data.

Would it be possible to produce such scatter plots with dots color coded (as attached) in Scilab 5?
.
yes it is, for instance using xfarcs() as below.
Regards

np = 40;    // number of points

x = grand(1,np, "unf", -20, 140);

y = grand(1,np, "unf", -50, 300);

dz = 6.4;

z = grand(1,np, "unf", -dz, dz);



clf

f = gcf();

nc = 100;

f.color_map = jetcolormap(nc);

plotframe([-20 -50 140 300])

c = round((z+dz)/(2*dz)*(nc-1)+1); // colors of dots scaled against their z

// shaping dots

ar = f.axes_size; ar = ar(1)/ar(2); // w/h aspect ratio of figure

dotsize_r = 0.04;   // relative size of dots

h = strange(y)*dotsize_r;

w = strange(x)*dotsize_r/ar;

dots = [x ; y ; ones(x)*w ; ones(x)*h ; zeros(x) ; ones(x)*64*360];

// plotting dots

xfarcs(dots, c);

// colorbar

colorbar(-dz,dz)
[cid:image001.png at 01D23091.20767130]
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