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Precision in CODAP vs. R

This topic has 2 replies, 2 voices, and was last updated 1 year, 8 months ago by Andee Rubin.

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April 18, 2023 at 4:57 pm #7605 Score: 1

Andee Rubin
Participant

Karma: 4 pts

A colleague of mine is comparing results she got from fitting a regression line in CODAP vs. the results obtained in R. There seems to be a slight discrepancy (in hundredths) between the results. Could this be due to rounding issues? Is precision in CODAP different from in R? I can get the CODAP file (and the reported results from R) if you don’t have an answer to this question right off the bat.

April 18, 2023 at 5:23 pm #7607

Bill Finzer
Keymaster

Hi Andee,

I don’t have a ready answer, so the ability to compare would be helpful.

Thanks,

Bill

April 18, 2023 at 10:18 pm #7608

Andee Rubin
Participant

Karma: 4 pts

Never mind – we figured it out. It was a problem with the way the data were imported into CODAP – they were rounded to whole numbers and lost information.
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