日志
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matlab中的百分位数函数prctile（重要）
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kongfeng0824 2013-7-26 22:54
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Syntax Y = prctile(X,p) example Y = prctile(X,p,dim) example Description Y = prctile(X,p) returnspercentiles of the values in a data vector or matrix X forthe percentages p in the interval . If X is a vector, then Y isa scalar or a vector with the same length as th ...
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个人分类: Matlab Study|1890 次阅读|0 个评论
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matlab中的绝对偏差函数mad
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kongfeng0824 2013-7-26 22:47
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Syntax y = mad(X) Y = mad(X,1) Y = mad(X,0) Description y = mad(X) returns the meanabsolute deviation of the values in X. For vectorinput, y is mean(abs(X-mean(X))).For a matrix input, y is a row vector containingthe mean absolute deviation of each column of X.For N-dimensional ...
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个人分类: Matlab Study|1347 次阅读|0 个评论
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matlab中75%-25%的极差函数iqr
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kongfeng0824 2013-7-26 22:42
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iqr Interquartile range Syntax y = iqr(X) iqr(X,dim) Description y = iqr(X) returns the interquartile range of the values in X. For vector input, y isthe difference between the 75th and the 25th percentiles of the samplein X. For matrix input, y is a row vector c ...
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个人分类: Matlab Study|670 次阅读|0 个评论
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matlab中的极差（最大值-最小值）函数range
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kongfeng0824 2013-7-26 22:36
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Syntax range(X) y = range(X,dim) Description range(X) returns the differencebetween the maximum and the minimum of a sample. For vectors, range(x) isthe range of the elements. For matrices, range(X) isa row vector containing the range of each column of X. For N-dimensionalarray ...
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个人分类: Matlab Study|2161 次阅读|0 个评论
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matlab中求去掉最大K/2%或和最小K/2%后的平均值的方法trimmean函数
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kongfeng0824 2013-7-26 22:33
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Syntax m = trimmean(X,percent) trimmean(X,percent,dim) m = trimmean(X,percent,flag) m = trimmean(x,percent,flag,dim) Description m = trimmean(X,percent) calculates the trimmed mean of the values in X. For a vector input, m is the mean of X, excluding the highest and lowest ...
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个人分类: 个人日记|1011 次阅读|0 个评论
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matlab中调和平均值函数harmmean
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kongfeng0824 2013-7-26 22:18
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Syntax m = harmmean(X) harmmean(X,dim) Description m = harmmean(X) calculatesthe harmonic mean of a sample. For vectors, harmmean(x) isthe harmonic mean of the elements in x. For matrices, harmmean(X) isa row vector containing the harmonic means of each column. For N-dimensiona ...
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个人分类: Matlab Study|1320 次阅读|0 个评论
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matlab中的几何平均值函数geomean
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kongfeng0824 2013-7-26 22:12
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Syntax m = geomean(x) geomean(X,dim) Description m = geomean(x) calculates the geometric mean of a sample. For vectors, geomean(x) is the geometric mean of the elements in x. For matrices, geomean(X) is a row vector containing the geometric means of each column. For N-dimens ...
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个人分类: Matlab Study|2399 次阅读|0 个评论
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积分、威望、金钱、贡献
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kongfeng0824 2013-3-25 22:35
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积分、威望、金钱、贡献不知道是做什么的呢？ 积分好像是下载文件时要扣除的吧？ 威望好像不清楚？ 金钱也不清楚？ 贡献好像有时候也需要扣除。
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个人分类: 个人日记|918 次阅读|4 个评论
热度 3
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时间飞逝
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kongfeng0824 2013-3-25 08:30
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时间飞逝 物是人非 感慨万千
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个人分类: 个人日记|253 次阅读|0 个评论
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