Re: NaN on linear regression with many categorical variables

[ftr public]

Hi,

as you are a newbie first question: did you do standard multiple regression analysis with a continuous dependent and several continuous independent variables before so that you know what you get in the output window ? And how to understand it ?

A first step is data cleaning. You should at least do the following:
You say you have two values for each independent variable, 0 and 1. The zeros are valid or are declared missing ? They must be valid.
Did you exclude cases that have nothing but 1 or nothing but 0 values for all cases (i.e. respondents did not play the game) ?
Once excluded the previous respondents you should do a correlation for all cases and variables to see whether there are variables with a correlation of 1, i.e. they are multicollinear - they explain exactly the same. So you exclude one of the two.
How many cases do you have, and how many independent variables ?

I recommend to read
Barbara G. Tabachnick and Linda S. Fidell: Using multivariate statistics. Pearson.
Joseph Hair et al. Multivariate data analysis.
I bought the 4th edition, with readings. You get a second hand edition at Alibris for 2.14€ plus postage.
You may also buy the 7th and latest international edition, for about 27 € & postage.

HTH as a starter.

- ftr

On 15/03/2018 18:58, John Darrington wrote:

Well at least that rules out any known problems with PSPP.

I suggest that your next step be to run DESCRIPTIVES on that same set of variables,
(both the dependent and independent) and see if there is anything interesting in that.

J'

On Thu, Mar 15, 2018 at 05:50:50PM +0100, Elisa Pieri wrote:
     I did update to the 0.10.2, but still the same results :(
     
     On Thu, Mar 15, 2018 at 5:32 PM, John Darrington <
     address@hidden> wrote:
     
     > On Thu, Mar 15, 2018 at 04:13:11PM +0100, Elisa Pieri wrote:
     >      Hello,
     >
     >      I'm using PSPP (psppire 0.8.5) on Linux Mint 18.3.
     >
     > This version is very old and there have been many fixes to the REGRESSION
     > procedure
     > in recent releases.
     >
     > I suggest that you upgrade.
     >
     > J'
     >
     > --
     > Avoid eavesdropping.  Send strong encrypted email.
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     >

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