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statf
Statistics of a vector/scalar field

Description ```STAT = statf(F) returns a structure containing some statistics for the scalar field F. [STATX,STATY] = statf(F) returns two structures, each containing the statistics for the X,Y components of the 2-components vector field F. [STATX,STATY,STATZ] = statf(F) returns 3 structures, each containing the statistics for the X,Y,Z components of the 3-comp. vector field F. F is a structure (or structure array) of fields as obtained by loadvec (vector field) or vec2scal (scalar field). If F is a single field, the statistics are spatial averages. If F is an array of fields, the statistics combine spatial and ensemble averages. The output structure STAT (or STATX, STATY, STATZ) contains the following fields: mean, std, rms: mean, standard deviation and rms. min, max: minimum and maximum nfields: number of fields used in the computation n: number of nonzero elements. zeros: number of zero elements. mom: non-centered moments, <s^n> momabs: non-centered absolute moments, <|s^n|> cmom: centered moments, <(s-<s>)^n> cmomabs: centered absolute moments, <|s-<s>|^n> skewness: normalized 3rd order non-centered moment. (*) flatness: normalized 4th order non-centered moment. (*) skewnessc: normalized 3rd order centered moment. (*) flatnessc: normalized 4th order centered moment. (*) history: remind for which field statf has been called. In these definitions, the brackets <> denote both spatial and possibly ensemble averages. ... = statf(F,MAXORDER) specifies the maximum order for the moments. MAXORDER=6 is used by default (although its convergence may not be guaranteed). The 4 quantities (*) are computed only if MAXORDER>2. If the fields contain 0 (zero) values, they are considered as erroneous and are not included into the computations. Examples v = loadvec('*.VC7'); statrot = statf(vec2scal(filterf(v,1),'rot')); statrot.rms See Also loadvec, vec2scal, histf, corrf, vsf, specf. Published output in the Help browser showdemo statf ```
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