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DickCun1-Visitor
1-Visitor
Jun 12, 2014 4:51 PM UTC
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Jackknife in Mathcad 15

Is anyone aware of how to create a matrix of a data vector using the Jackknife procedure in Mathcad 15?

DickCunAnswer
1-Visitor
Jun 15, 2014 6:13 PM UTC

Thanks so much.....your solutiom is very elgant!!!

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8 replies

Werner_E
Werner_E25-Diamond I
25-Diamond I
Jun 12, 2014 5:13 PM UTC

Which problems have you encountered when you tried to implement it in Mathcad?

Attach your sheet to get help with your approach.

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DickCun1-VisitorAuthor
1-Visitor
Jun 12, 2014 10:55 PM UTC

I have used this process in Excel, as well as the Bootstrap in Excel and Mathcad. At the present I am stumped as to how to accomplish the Jackknife in Mathcad an thus have not provided a Mathcad sheet. I am currently analyzing data found in Bury's text examples using both Log-Normal and Gumbel distributions. Ultimately, I would use this method or the Bootstrap in the analysis of snow loads. I would like to find the standard error of the 50 yr, 100 yr mean recurrence interval.

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MikeArmstrong1-Visitor
1-Visitor
Jun 13, 2014 5:52 AM UTC

I suggest you post what you have attempted thus far to give collabs on here something to work with.

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Fred_Kohlhepp23-Emerald I
23-Emerald I
Jun 13, 2014 10:45 AM UTC

If Wikipedia is right.

Not sure about variance and bias.

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DickCun1-VisitorAuthor
1-Visitor
Jun 14, 2014 1:22 AM UTC

Thanks for your help Fred. It helped me develope the attached Mathcad 15 spreadsheet. May be you can help further. Would appreciate it.

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MikeArmstrong1-Visitor
1-Visitor
Jun 14, 2014 6:31 AM UTC

I think you need to revisit the basics of your program. You are using submatrx and trying to pass a range to the lower indices to be extracted for a single column vector, obviously this is not going to work.

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