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Student Support Forum: 'ListPlot & Non linear fitting' topicStudent Support Forum > General > Archives > "ListPlot & Non linear fitting"

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Eric
05/20/12 09:04am

Good day,
I am relatively new to mathematica, and I am using it to fit a formula to a dataset that I have. To begin with, I am having issues with a very simple part, namely with a ListPlot.

I have an xls file with 2 columns and 26 rows, corresponding to an x and a y value. Using import, I neatly get these into mathematica. However, when I use listplot, all I get is an empty plot, ranging between -1 and 1 for both the x and the y scale. I must be doing something simple wrong, but I honestly can't figure out what it is.
If needed, the xls file can be found at: http://www.2shared.com/document/8QRVqv-t/Tumor_Growth_Data.html

Now, the next part I haven't really tried too much with yet, but it is giving me cringes even trying to think about it. I have a formula in the form of
W^((A/a)*(1-e^(-a*t))), where W, A and a are parameters that have to be fitted, t is the x from the datalist and the output is the y from the datalist. Could anyone maybe point me to a tutorial or guide on how to get me started with this?

Thanks in advance

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Subject (listing for 'ListPlot & Non linear fitting')
Author Date Posted
ListPlot & Non linear fitting Eric 05/20/12 09:04am
Re: ListPlot & Non linear fitting Forum Modera... 05/20/12 7:08pm
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