# Vary point color with scatter

Hi list,

I have a set of data with 3 "columns" :
x = x coordinate of the point
y = y coordinate
z = temperature

I can't see how to set a different color for each point function of temperature value.

I have tried, which draw a colorfull beautiful "map", the color varying with the row rank of x (not what I want)

···

**********
sqla="SELECT x, y, temperature FROM import_parcelle a WHERE dat_loc='" + date_traite + "' AND code_uc='" + code_uc + "' ORDER BY a.dateheure;"
resa=db.query(sqla)
data=resa.dictresult()
x= [float(a["x"]) for a in data] # --> extraction de la colonne x
y= [float(a["y"]) for a in data] # --> extraction de la colonne y
z= [float(a["temperature"]) for a in data] # --> extraction de la colonne temperature

scatter(x, y, c=arange(len(x)), cmap=cm.spring)
title("Carte des temperatures(L/min)")
xlim(min(x)-10,max(x)+10)
ylim(min(y)-10,max(y)+10)
**********

What is the good way to do what I reach for ?
I have much trouble to know how to define the c parameter of scatter. I saw the "arrange" thing somewhere in internet, but don't understand what it is for.

Michael

Have you tried the scatter demos? See for example
http://matplotlib.sf.net/examples/scatter_demo2.py

JDH

···

On Tue, Feb 26, 2008 at 3:23 AM, Michaël Douchin <michael.douchin@...547...> wrote:

What is the good way to do what I reach for ?
I have much trouble to know how to define the c parameter of scatter. I
saw the "arrange" thing somewhere in internet, but don't understand what
it is for.