Talk:Verify distribution uniformity/Chi-squared test: Difference between revisions
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:I am not completely sure what "the incomplete gamma function" is, but here's the J implementation: |
:I am not completely sure what "the incomplete gamma function" is, but here's the J implementation: |
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<lang j>4 :0 |
:<lang j>4 :0 |
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(1 H. (1+x) % x&((* ^) * (^ -)~)) y |
(1 H. (1+x) % x&((* ^) * (^ -)~)) y |
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)</lang> |
)</lang> |
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So, for example if x is 1.5 and y is 4.1 |
:So, for example if x is 1.5 and y is 4.1 |
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<lang j> (1 H. (1+1.5) % 1.5&((* ^) * (^ -)~)) 4.1 |
:<lang j> (1 H. (1+1.5) % 1.5&((* ^) * (^ -)~)) 4.1 |
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0.848957</lang> |
0.848957</lang> |
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The right argument to H. is: |
:The right argument to H. is: |
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<lang j> ((1+1.5) % 1.5&((* ^) * (^ -)~)) 4.1 |
:<lang j> ((1+1.5) % 1.5&((* ^) * (^ -)~)) 4.1 |
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0.229307</lang> |
0.229307</lang> |
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In other words, 2.5 divided by 10.9024: |
:In other words, 2.5 divided by 10.9024: |
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<lang j> ( 1.5&((* ^) * (^ -)~)) 4.1 |
:<lang j> ( 1.5&((* ^) * (^ -)~)) 4.1 |
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10.9024</lang> |
10.9024</lang> |
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In other words (1.5 * ^ 4.1) * 4.1 ^ -1.5. (^y with no left argument is e^y). |
:In other words (1.5 * ^ 4.1) * 4.1 ^ -1.5. (^y with no left argument is e^y). |
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And H. is the primitive documented at http://www.jsoftware.com/help/dictionary/dhcapdot.htm |
:And H. is the primitive documented at http://www.jsoftware.com/help/dictionary/dhcapdot.htm |
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I do not know if this helps, though. |
:I do not know if this helps, though. |
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--[[User:Rdm|Rdm]] 22:28, 7 May 2011 (UTC) |
--[[User:Rdm|Rdm]] 22:28, 7 May 2011 (UTC) |
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