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From |
"Nick Cox" <[email protected]> |

To |
<[email protected]> |

Subject |
st: RE: Plotting observed and predicted values on same scatterplot matrix |

Date |
Wed, 24 Jul 2002 10:43:15 +0100 |

Dale Steele > I have been struggling to "overlie" two sets of data on the same > scatterplot matrix. I have two stata data files. The > first contains the > raw data from an experiment. The second file contains > calculated predicted > values which I would like to plot as a line on top of the > observed values in > the first file. > > Various permutations of the -merge- command have failed > to merge the two files. > > I've made plots of each using: > graph response resistnc, by(idnum) total jitter(2) > ylabel(0, 2 to 10) > and > graph R resistnc, by(idnum) connect(l) ylabel(0, 2 to 10) total > > Suggestions? > > Details follow.. > > Each subject given 6 stimuli, response to each stimulus > measured five > times. Thus the file looks like: > > list idnum resistnc response > > idnum resistnc response > 1. 401 0 0 > 2. 401 0 0 > 3. 401 0 0 > 4. 401 0 .7 > 5. 401 0 0 > 6. 401 2.5 1.9 > 7. 401 2.5 1.5 > ... > > The second file contains a predicted response (R) based on > a predicted curve > for each subject. > > . list idnum resistnc R > > idnum resistnc R > 1. 401 0 .14 > 2. 401 2.5 2.489528 > 3. 401 5 3.538459 > 4. 401 10 5.055678 > 5. 401 20 7.25025 > 6. 401 30 8.963791 > 7. 402 0 .4 > 8. 402 2.5 1.289712 > 9. 402 5 2.060106 > 10. 402 10 3.497576 > 11. 402 20 6.179739 > Note that Dale wants a matrix of scatterplots, but not one in the sense of -graph, matrix-. The files having been merged, this would seem to be something like . sort idnum . graph response R resistnc, by(idnum) total jitter(2) ylabel(0(2)10) c(.l) sy(oi) The key question thus appears to be what Dale tried with -merge- and why it didn't work. The only clue given here is that -resistnc- appears in different form for -idnum- 401. Nick [email protected] * * For searches and help try: * http://www.stata.com/support/faqs/res/findit.html * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/

**References**:**st: Plotting observed and predicted values on same scatterplot matrix***From:*"Dale Steele" <[email protected]>

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