np.argmax()返回数组中最大值的索引。 6. 查找满足条件的第一个值的索引 有时我们只需要找到满足条件的第一个值的索引。 importnumpyasnp arr=np.array([1,2,3,4,5,3,7,8,9])first_index=np.where(arr==3)[0][0]print("numpyarray.com: First index of value 3:",first_index) Python Copy ...
np.max np.nanmax Find maximum value np.argmin np.nanargmin Find index of minimum value np.argmax np.nanargmax Find index of maximum value np.median np.nanmedian Compute median of elements np.percentile np.nanpercentile Compute rank-based statistics of elements np.any N/A Evaluate whether ...
np.maxnp.nanmaxFind maximum value np.argminnp.nanargminFind index of minimum value np.argmaxnp.nanargmaxFind index of maximum value np.mediannp.nanmedianCompute median of elements np.percentilenp.nanpercentileCompute rank-based statistics of elements np.anyN/AEvaluate whether any elements are ...
np.prod np.nanprod Compute product of elements np.mean np.nanmean Compute mean of elements np.std np.nanstd Compute standard deviation np.var np.nanvar Compute variance np.min np.nanmin Find minimum value np.max np.nanmax Find maximum value np.argmin np.nanargmin Find index of minimum v...
np.min np.nanmin Find minimum value np.max np.nanmax Find maximum value np.argmin np.nanargmin Find index of minimum value np.argmax np.nanargmax Find index of maximum value np.median np.nanmedian Compute median of elements np.percentile np.nanpercentile Compute rank-based statistics of ...
See Figure 4-1 for an illustration of indexing on a two-dimensional array. I find it helpful to think of axis 0 as the “rows” of the array and axis 1 as the “columns.” Figure 4-1. Indexing elements in a NumPy array In multidimensional arrays, if you omit later indices, the re...
Return a with each element rounded to the given number of decimals. searchsorted(v[, side, sorter]) Find indices where elements of v should be inserted in a to maintain order. setfield(val, dtype[, offset]) Put a value into a specified place in a field defined by a data-type. set...
max,min,argmax,argmin These are useful methods for finding max or min values. Or to find their index locations using argmin or argmaxIn [27]: ranarr Out[27]: array([38, 3, 2, 47, 22, 9, 15, 29, 35, 23]) In [28]: ranarr.max() Out[28]: 47 ...
zeros(shape[, dtype, order])Return a matrix of given shape and type, filled with zeros. ones(shape[, dtype, order])Matrix of ones. eye(n[, M, k, dtype, order])Return a matrix with ones on the diagonal and zeros elsewhere.
13. Create a 10x10 array with random values and find the minimum and maximum values 创建一个10*10的随机值数组,并找到最大最小值 Z = np.random.random((10,10)) Zmin, Zmax = Z.min(), Z.max() print(Zmin, Zmax) 14. Create a random vector of size 30 and find the mean value ...