hi, can anyone one help me if i have matrix A i want get index matrix for matrix A A=[9 5 1 6 5 7 8 4 11] for exmple The result A_index =11 12 13 21 22 23 31 32 33
+ when I call 7 in matrix B, it will show the value (x7 y7 z7) from matrix A. + when I call [3,7] in matrix B, it will show the value matrix: 테마복사 A=[ x3 y3 z3 x7 y7 z7] + when I call n in matrix B, it will show the value (xn yn zn) from mat...
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These are the locations in the matrix in which the logical expression is true, in this case, any location greater than 12. Now the expressionA(A > 12) extracts the matrix elements corresponding to the nonzero values of the logical array. The output is always in the form of a column ...
Thesize()function supports two arguments. The first argument is the name of our matrix (with some data), of which we want to get the number of columns. The second argument can be either1or2. The numeric number1returns the number of rows of the matrix, whereas the numeric number2returns...
dmd#keyvaluepairsPending Maximum Storage Duration: PersistentType: IndexedDB dmd#local-forage-detect-blob-supportPending Maximum Storage Duration: PersistentType: IndexedDB dmd-ahkCollects information on user behaviour on multiple websites. This information is used in order to optimize the relevance of ...
(sortArray) #数据全部的方差arraySum tempSum=0 num=0 for i in sortArray: tempSum+=i num+=1 if tempSum>=arraySum*percentage: return num '''pca函数有两个参数,其中dataMat是已经转换成矩阵matrix形式的数据集,列表示特征;其中的percentage表示取前多少个特征需要达到的方差占比,默认为0.9''' def ...
第一种是Matrix Market (.mtx 格式),中间right hand side 是方程组 Ax=b 的右端项b。 第二种是 Harwell—Boeing 即(HB 格式) .rua 格式 。 注:mtx格式的矩阵就是通常的坐标存储方式,记录所有非零元的行和对应的列,而HB格式是新的存储方式,按照某种压缩原理,记录非零元,简单讲就是HB格式效率更高,同样...
Each contour line defined in matrix C begins with a column that contains the value of the contour (specified by v and used by clabel), and the number of (x,y) vertices in the contour line. The remaining columns contain the data for the(x,y) pairs. C = [value1 xdata(1) xdata(2...
Take, for example the MATLAB internals: Many of the functions that you might make use of when programming MATLAB are implemented in MATLAB syntax themselves – by professional MathWorks programmers. To look at such the contents of the mean() function (which calculates the average mean value of ...