小编van*_*ren的帖子

我执行以下代码：

df<-data.frame(word=c("play","win","offer","http"),frequency=c(321,355,123,564),type=c("nonspam","nonspam","spam","spam"))

df=arrange(df,desc(frequency),desc(type))

df=df[order(df[,2],df[,3]),]

结果是：

   word frequency type
4 offer       123    spam
3  play       321    nonspam
2   win       355    nonspam
1  http       564    spam

但我想根据频率和类型对数据框进行排序，例如：

word frequency type
    1  http      564    spam
    4  offer     123    spam
    2  win       355    nonspam
    3  play      321    nonspam

clist=[(-1.2720626442476508, 0.023952387163360456),
      (1.509233613482305, -1.196551723413994),
      (-0.37776845297034178, -1.9620288805522699),
      (-0.95028695770255522, -1.5670871848691932),
      (-0.19286972570683192, -1.2638500626369975),
      (1.19847548993563, 0.32781113190011446),
      (-0.93998357957640977, 0.74954973932266267),
      (-0.65151553614971647, -0.65350263688351395),
      (-0.65151553614971647, -0.65350263688351395)]

fig = plt.figure()
ax = plt.axes(xlim=(-2, 200), ylim=(-2, 2))
plt.plot(clist,'ro')
plt.show()

如您所见,x坐标超过值2.y坐标是正确的.

c=np.random.rand(10,2)从中生成一个随机数组[0,1).我可以生成相同的数组(就大小而言)但是具有负数和正数吗？此外,我可以选择此阵列的限制和尺寸吗？例如,如果我想从-2到2.