indices

问题 I am trying to use Pandas to represent motion-capture data, which has T measurements of the (x, y, z) locations of each of N markers. For example, with T=3 and N=4, the raw CSV data looks like: T,Ax,Ay,Az,Bx,By,Bz,Cx,Cy,Cz,Dx,Dy,Dz 0,1,2,1,3,2,1,4,2,1,5,2,1 1,8,2,3,3,2,9,9,1,3,4,9,1 2,4,5,7,7,7,1,8,3,6,9,2,3 This is really simple to load into a DataFrame, and I've learned a few tricks that are easy (converting marker data to z-scores, or computing velocities, for example). One thing I'd like

问题 I am trying to use Pandas to represent motion-capture data, which has T measurements of the (x, y, z) locations of each of N markers. For example, with T=3 and N=4, the raw CSV data looks like: T,Ax,Ay,Az,Bx,By,Bz,Cx,Cy,Cz,Dx,Dy,Dz 0,1,2,1,3,2,1,4,2,1,5,2,1 1,8,2,3,3,2,9,9,1,3,4,9,1 2,4,5,7,7,7,1,8,3,6,9,2,3 This is really simple to load into a DataFrame, and I've learned a few tricks that are easy (converting marker data to z-scores, or computing velocities, for example). One thing I'd like

问题 I have made for this question an easier example of two arrays: The labelArray is a 1D-array has labels at indices which corresponds to the same indices of the nD-array someValuesArray . I get all indices where label 2 occurs and want to retrieve the values in someValuesArray . labelArray = [2,0,1,2] someValuesArray= [array([[ 2.15072 , 2.12438 , 2.27047 , 2.64567 , 2.22976 , 2.18186 ]], dtype=float32), array([ [ 2.29442, 2.3087 , 2.3111 , 2.1962 , 2.23694, 2.16988]], dtype=float32)), array([

问题 I have made for this question an easier example of two arrays: The labelArray is a 1D-array has labels at indices which corresponds to the same indices of the nD-array someValuesArray . I get all indices where label 2 occurs and want to retrieve the values in someValuesArray . labelArray = [2,0,1,2] someValuesArray= [array([[ 2.15072 , 2.12438 , 2.27047 , 2.64567 , 2.22976 , 2.18186 ]], dtype=float32), array([ [ 2.29442, 2.3087 , 2.3111 , 2.1962 , 2.23694, 2.16988]], dtype=float32)), array([

来源： https://stackoverflow.com/questions/53212507/how-to-efficiently-retrieve-the-indices-of-maximum-values-in-a-torch-tensor

来源： https://stackoverflow.com/questions/53212507/how-to-efficiently-retrieve-the-indices-of-maximum-values-in-a-torch-tensor

来源： https://stackoverflow.com/questions/48545076/selecting-multiple-dataframe-columns-by-position-in-pandas

来源： https://stackoverflow.com/questions/48545076/selecting-multiple-dataframe-columns-by-position-in-pandas

来源： https://stackoverflow.com/questions/49227360/how-to-extract-columns-from-data-table-by-indices-in-r

来源： https://stackoverflow.com/questions/9503510/how-to-invert-numpy-where-np-where-function