python 生成数据均匀的点

import numpy as np
print(np.linspace(-100,100,201)

np.linspace()，起始位置，终止位置，中间包括0，一共要201个点

因为-100，100共201个点，包括两边的数据，也就是数学上的闭区间。

结果：

-100.  -99.  -98.  -97.  -96.  -95.  -94.  -93.  -92.  -91.  -90.  -89.
  -88.  -87.  -86.  -85.  -84.  -83.  -82.  -81.  -80.  -79.  -78.  -77.
  -76.  -75.  -74.  -73.  -72.  -71.  -70.  -69.  -68.  -67.  -66.  -65.
  -64.  -63.  -62.  -61.  -60.  -59.  -58.  -57.  -56.  -55.  -54.  -53.
  -52.  -51.  -50.  -49.  -48.  -47.  -46.  -45.  -44.  -43.  -42.  -41.
  -40.  -39.  -38.  -37.  -36.  -35.  -34.  -33.  -32.  -31.  -30.  -29.
  -28.  -27.  -26.  -25.  -24.  -23.  -22.  -21.  -20.  -19.  -18.  -17.
  -16.  -15.  -14.  -13.  -12.  -11.  -10.   -9.   -8.   -7.   -6.   -5.
   -4.   -3.   -2.   -1.    0.    1.    2.    3.    4.    5.    6.    7.
    8.    9.   10.   11.   12.   13.   14.   15.   16.   17.   18.   19.
   20.   21.   22.   23.   24.   25.   26.   27.   28.   29.   30.   31.
   32.   33.   34.   35.   36.   37.   38.   39.   40.   41.   42.   43.
   44.   45.   46.   47.   48.   49.   50.   51.   52.   53.   54.   55.
   56.   57.   58.   59.   60.   61.   62.   63.   64.   65.   66.   67.
   68.   69.   70.   71.   72.   73.   74.   75.   76.   77.   78.   79.
   80.   81.   82.   83.   84.   85.   86.   87.   88.   89.   90.   91.
   92.   93.   94.   95.   96.   97.   98.   99.  100.]

但 如果 你没有计算两个数之间有多少点。

例如下意识的在（-100,100，200）之间取200个点，情况和你想的不一样：

结果：

[-100.          -98.99497487  -97.98994975  -96.98492462  -95.9798995
  -94.97487437  -93.96984925  -92.96482412  -91.95979899  -90.95477387
  -89.94974874  -88.94472362  -87.93969849  -86.93467337  -85.92964824
  -84.92462312  -83.91959799  -82.91457286  -81.90954774  -80.90452261
  -79.89949749  -78.89447236  -77.88944724  -76.88442211  -75.87939698
  -74.87437186  -73.86934673  -72.86432161  -71.85929648  -70.85427136
  -69.84924623  -68.84422111  -67.83919598  -66.83417085  -65.82914573
  -64.8241206   -63.81909548  -62.81407035  -61.80904523  -60.8040201
  -59.79899497  -58.79396985  -57.78894472  -56.7839196   -55.77889447
  -54.77386935  -53.76884422  -52.7638191   -51.75879397  -50.75376884
  -49.74874372  -48.74371859  -47.73869347  -46.73366834  -45.72864322
  -44.72361809  -43.71859296  -42.71356784  -41.70854271  -40.70351759
  -39.69849246  -38.69346734  -37.68844221  -36.68341709  -35.67839196
  -34.67336683  -33.66834171  -32.66331658  -31.65829146  -30.65326633
  -29.64824121  -28.64321608  -27.63819095  -26.63316583  -25.6281407
  -24.62311558  -23.61809045  -22.61306533  -21.6080402   -20.60301508
  -19.59798995  -18.59296482  -17.5879397   -16.58291457  -15.57788945
  -14.57286432  -13.5678392   -12.56281407  -11.55778894  -10.55276382
   -9.54773869   -8.54271357   -7.53768844   -6.53266332   -5.52763819
   -4.52261307   -3.51758794   -2.51256281   -1.50753769   -0.50251256
    0.50251256    1.50753769    2.51256281    3.51758794    4.52261307
    5.52763819    6.53266332    7.53768844    8.54271357    9.54773869
   10.55276382   11.55778894   12.56281407   13.5678392    14.57286432
   15.57788945   16.58291457   17.5879397    18.59296482   19.59798995
   20.60301508   21.6080402    22.61306533   23.61809045   24.62311558
   25.6281407    26.63316583   27.63819095   28.64321608   29.64824121
   30.65326633   31.65829146   32.66331658   33.66834171   34.67336683
   35.67839196   36.68341709   37.68844221   38.69346734   39.69849246
   40.70351759   41.70854271   42.71356784   43.71859296   44.72361809
   45.72864322   46.73366834   47.73869347   48.74371859   49.74874372
   50.75376884   51.75879397   52.7638191    53.76884422   54.77386935
   55.77889447   56.7839196    57.78894472   58.79396985   59.79899497
   60.8040201    61.80904523   62.81407035   63.81909548   64.8241206
   65.82914573   66.83417085   67.83919598   68.84422111   69.84924623
   70.85427136   71.85929648   72.86432161   73.86934673   74.87437186
   75.87939698   76.88442211   77.88944724   78.89447236   79.89949749
   80.90452261   81.90954774   82.91457286   83.91959799   84.92462312
   85.92964824   86.93467337   87.93969849   88.94472362   89.94974874
   90.95477387   91.95979899   92.96482412   93.96984925   94.97487437
   95.9798995    96.98492462   97.98994975   98.99497487  100.        ]

所以，在使用这个函数时，要仔细考虑两端的数据，还有你需要多少点。