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10-02-2000
03:00 AM

10-02-2000
03:00 AM

Spline Fitting & Integration

Dear All,

I am having trouble with the attached file. The `Rds` matrix represents the `X` values of a graph, while each of the columns in the `Thr` matrix represent the `Y` values of the graph. I want to fit a cubic spline interpolation to each of the columns of the `Thr` matrix in turn, find the area under the curve i.e. the total thrust for each column and then plot a graph of the each thrust against its corresponding column number.

Can anybody help please.

Regards,

Neil Moran

I am having trouble with the attached file. The `Rds` matrix represents the `X` values of a graph, while each of the columns in the `Thr` matrix represent the `Y` values of the graph. I want to fit a cubic spline interpolation to each of the columns of the `Thr` matrix in turn, find the area under the curve i.e. the total thrust for each column and then plot a graph of the each thrust against its corresponding column number.

Can anybody help please.

Regards,

Neil Moran

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10-03-2000
03:00 AM

10-03-2000
03:00 AM

Spline Fitting & Integration

Dear Nile,

I hope that my files help you.

See also the messages in the forum Probability & Statistic.

Valery Ochkov

http://twt.mpei.ac.ru/ochkov

I hope that my files help you.

See also the messages in the forum Probability & Statistic.

Valery Ochkov

http://twt.mpei.ac.ru/ochkov

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10-04-2000
03:00 AM

10-04-2000
03:00 AM

Spline Fitting & Integration

Hi Valery,

Many thanks for your files, which I have had a look at. But I am still having trouble trying to achieve what I want. I dont seem to be able to create a range variable in order to index each of the columns, one at a time

Does anybody have any more suggestions please?

Many Thanks,

Neil Moran

Many thanks for your files, which I have had a look at. But I am still having trouble trying to achieve what I want. I dont seem to be able to create a range variable in order to index each of the columns, one at a time

Does anybody have any more suggestions please?

Many Thanks,

Neil Moran