[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

st: RE: Altering individual data markers in a graph

From   "Nick Cox" <>
To   <>
Subject   st: RE: Altering individual data markers in a graph
Date   Tue, 30 Jun 2009 20:16:38 +0100

There is no way this approach will work. -mcolor()- will not look inside a string variable. Also, each scatter plot uses precisely one colour. However, the problem is soluble otherwise. 

One way to proceed is as follows: 

graph twoway (scatter pressure age if colorcode == "R", mcolor(red))
(scatter pressure age if colorcode == "Y", mcolor(yellow))
(scatter pressure age if colorcode == "B", mcolor(blue))

Another is to use -separate- first. See the online help. 

Also see

SJ-5-4  gr0023  . . . . Stata tip 27: Classifying data points on scatter plots
        . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  N. J. Cox
        Q4/05   SJ 5(4):604--606                                 (no commands)
        tips for using separate, gray-scale gradation, and text
        characters as class symbols to classify data points on
        a scatter plot


Ron Gutmark

I am trying to make a scatter plot (of eye pressure vs. age) and
change the color of particular markers.  I have a variable called
"colorcode" in which I store a single letter depending on what color I
want the marker to be (i.e. B for blue, R for red, Y for yellow).

I tried doing this (see below), but it doesn't work:

 gen col = "black"
 replace col = "red" if colorcode == "R"
 replace col = "yellow" if colorcode == "Y"
 replace col = "blue" if colorcode == "B"
 graph twoway (scatter pressure age, mcolor(col))

When I try to make the graph it says: "(note:  named style col not
found in class color, default attributes used"

Any input on what I'm doing wrong and how I can fix it would be
greatly appreciated (or suggestions on other ways to do this).

*   For searches and help try:

© Copyright 1996–2022 StataCorp LLC   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index