Topic: error for exponential regression

I am trying to graph an exponential regression trendline to data points I have entered.  I have received the following error:

Internal error! Please report this to the programmer with steps to reproduce exp(-3786.7256032417,0): UNDERFLOW error Continue?

I don't know what this means and obviously it does not give me a trendline.

Re: error for exponential regression

It means that something went wrong. What exactly did you do?

Re: error for exponential regression

I typed in all my data points:

x (time in sec)   y (voltage in Volts)
0            20.4
0.00016    14.6
0.00036    10.8
0.00052    8.8
0.00076    6.4
0.00102    4.8
0.00128    3.8
0.00152    3
0.00178    2.8
0.00202    2.2
0.00226    2
0.00252    1.6
0.00278    1.6
0.00302    1.4
0.00328    1.4
0.00352    1.2


Then I adjusted the zoom to fit the screen.  Then I tried to add an exponential trendline and received the error I previously posted.  It did this to me on three different data sets.

Re: error for exponential regression

Thanks for clarifying. I can reproduce it now. Fortunately the problem has already been fixed in the beta version of Graph 4.4, which by the way is close to being released. You can find it at http://padowan.dk/graph/DownloadBeta.php