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matlab中读取格点数据函数arcgridread
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kongfeng0824 2013-9-17 15:11
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Syntax = arcgridread(filename) Description = arcgridread(filename) readsa grid from a file in Arc ASCII Grid format. Z isa 2-D array containing the data values. R is areferencing matrix (see makrefmat). NaN isassigned to elements of V corresponding to nulldata values in the grid file ...
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个人分类: Matlab Study|666 次阅读|0 个评论
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matlab中的数字的排列组合perms
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kongfeng0824 2013-9-16 19:59
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Syntax P = perms(v) Description P = perms(v), where v isa row vector of length n, creates a matrix whoserows consist of all possible permutations of the n elementsof v. Matrix P contains n! rowsand n columns. Examples The command perms( ) returns all thepermutatio ...
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个人分类: Matlab Study|717 次阅读|0 个评论
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matlab中的前后差函数diff
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kongfeng0824 2013-9-16 19:48
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Syntax Y = diff(X) Y = diff(X,n) Y = diff(X,n,dim)
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个人分类: Matlab Study|148 次阅读|0 个评论
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matlab中的累和函数cumsum
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kongfeng0824 2013-9-16 19:14
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Syntax B = cumsum(A) B = cumsum(A,dim) Examples cumsum(1:5) ans = A = ; cumsum(A,1) ans = 1 2 3 5 7& ...
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个人分类: Matlab Study|531 次阅读|0 个评论
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matlab中的累积函数cumprod
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kongfeng0824 2013-9-16 19:13
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Syntax B = cumprod(A) B = cumprod(A,dim) Examplescumprod(1:5) ans = 1 2 6 24 120 A = ; cumprod(A,1) ans = 1 2 3 4 10 18 cumprod(A,2) ans = 1 2 6 4 20 120
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个人分类: Matlab Study|198 次阅读|0 个评论
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matlab中的连乘函数factorial和prod
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kongfeng0824 2013-9-16 19:10
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Syntax factorial(N) factorial(6) ans = 720 Syntax B = prod(A) B = prod(A,dim) B = prod(A,'double') B = prod(A,'native')
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个人分类: Matlab Study|262 次阅读|0 个评论
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matlab中的常数的因子分解函数factor
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kongfeng0824 2013-9-16 19:07
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Syntax f = factor(n) Description f = factor(n) returns arow vector containing the prime factors of n. Examples f = factor(123) f = 3 41
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个人分类: Matlab Study|686 次阅读|0 个评论
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matlab中求取指定区间的多项式根fzero
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kongfeng0824 2013-9-16 18:40
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Syntax x = fzero(fun,x0) x = fzero(fun,x0,options) = fzero(...) = fzero(...) = fzero(...)
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个人分类: Matlab Study|430 次阅读|0 个评论
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matlab中的多项式求根函数roots
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kongfeng0824 2013-9-16 18:37
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Syntax r = roots(c) Examples The polynomial s 3 –6 s 2 – 72 s –27 is represented in MATLAB software as p = The roots of this polynomial are returned in a column vector by r = roots(p) r = 12.1229 -5.7345 -0.3884
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个人分类: Matlab Study|1475 次阅读|0 个评论
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matlab中的最小二乘曲线拟合函数lsline
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kongfeng0824 2013-9-16 18:33
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Syntax lsline h = lsline
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个人分类: Matlab Study|422 次阅读|0 个评论
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