Matlab中cellfun函數的使用

標籤：

Compute the mean of each vector in cell array C.C = {1:10, [2; 4; 6], []};averages = cellfun(@mean, C)This code returnsaverages =    5.5000    4.0000       NaN

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Compute the size of each array in C, created in the previous example.[nrows, ncols] = cellfun(@size, C)This code returnsnrows =     1     3     0ncols =    10     1     0

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　　cellfun中使用自訂函數對cell數組進行處理；既然可以自訂函數，那麼cellfun中的的中間部分的參數個數和自訂函數需要的參數數目相同。

　　還能這麼用。

 

queryNearestNeighborIds = cellfun( @(vector, index) vector(index), queryCandidateIds, queryNearestNeighborIds, ‘UniformOutput‘, false );

 

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Create a cell array that contains strings, and abbreviate those strings to the first three characters. Because the output strings are nonscalar, set UniformOutput to false.days = {‘Monday‘, ‘Tuesday‘, ‘Wednesday‘, ‘Thursday‘, ‘Friday‘};abbrev = cellfun(@(x) x(1:3), days, ‘UniformOutput‘, false)The syntax @(x) creates an anonymous function. This code returnsabbrev =     ‘Mon‘    ‘Tue‘    ‘Wed‘    ‘Thu‘    ‘Fri‘

Matlab中cellfun函數的使用