Displaying 2 results from an estimated 2 matches for "trapezium".
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trapezint
2010 Aug 29
1
Finding functions of large dataset for numerical integration
Hello everyone,
I have been trying to figure out away to integrate under a spline produced
by the package tps(fields). As the package does not output functions I am
trying to do something similar to the trapezium rule. My data are 3D (x, y &
z). I have extracted from the surface output by Tps the values of z at
regular intervals so that I have a grid of figures, for example:
1 4 6 6 8
8 3 2 7 7
2 3 4 9 7
1 2 5 6 7
0 1 4 5 6
I was wondering what the best method for working out the...
2004 Aug 23
0
corrections for R-intro.texi (PR#7192)
...would be if they were on the search path.
-The example below shows a naive way of performing one dimensional
+The example below shows a naive way of performing one-dimensional
numerical integration. The integrand is evaluated at the end points of
the range and in the middle. If the one-panel trapezium rule answer is
close enough to the two panel, then the latter is returned as the value.
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[-plots,-] {+plots+}
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--- R-intro.texi~ Mon Aug 23 13:23:55 2004
++...