Numerical integration in Matlab

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Moritz
Moritz 2013-8-23
Hi I want to numerically integrate some function in Matlab using "integral". Say f_int(x). However, f_int can not handle vector inputs. This seems to cause "integral" troubles? Any ideas how to quickly fix this, w/o having to rewrite f_int(x)? Thanks a lot. M

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回答（1 个）

Andrei Bobrov
Andrei Bobrov 2013-8-23
Try:
f2_int = @(y)arrayfun(@(x)f_int(x),y);
out = integral(f2_int,a,b); % here a and b - double
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Mike Hosea
Mike Hosea 2013-8-24
编辑：Mike Hosea 2013-8-24
Andrei's answer is the way I prefer to do it. However, in a pinch you can leverage the 'Arrayfun',true option to treat the problem as a vector-valued integral (just one that happens to return a vector of only one element)
out = integral(f_int,a,b,'ArrayValued',true);

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