Question about Texas Instruments TI-89 Calculator

# Hi , i've used Logistic regression to solve problem, given a tABle of values, but my calculator continues giving me "singular matrix" answer, what does it mean? how should I solve the problem?

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• anna_ussur Feb 24, 2009

I know that it should make sense with no zeros , how can you change it?

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That means that the determinant of the table(s) is 0.

Posted on Feb 24, 2009

Hi,
A 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017

SOURCE: Singular matrix error

I had this problem as well...Were you working on a SinReg equation by any chance? I was able to do every other type of regression (Linear, quadratic, cubic, ect..) In order to get Sinusoidal regression you need to make sure you arrow down to the Period box when entering the equation, and fill it in with the number of items in your table of values (a ten item list means a period of 10). That was the fix for me, so hopefully it works for you!

Posted on Feb 04, 2009

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Apr 03, 2009 | Texas Instruments TI-89 Calculator

### Singular matrix error

I had this problem as well...Were you working on a SinReg equation by any chance? I was able to do every other type of regression (Linear, quadratic, cubic, ect..) In order to get Sinusoidal regression you need to make sure you arrow down to the Period box when entering the equation, and fill it in with the number of items in your table of values (a ten item list means a period of 10). That was the fix for me, so hopefully it works for you!

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