Plot multiple columns of Pandas DataFrame using Se

问题:

suppose I have DataFrame with columns ['X_Axis','col_2','col_3',...,'col_n',]

I need to plot the first column on X-Axis and rest on Y-Axis. FYI : all the values have been grouped according to X-Axis, the X-Axis values range from 0-25 and all other column values have been normalized to the scale of 0 - 1. I want it on same graph plot, not subplots.

Preferred : FactorPlot , normal line graph.

回答1:

You need melt for reshape with seaborn.factorplot:

df = df.melt('X_Axis', var_name='cols', value_name='vals')
#alternative for pandas < 0.20.0
#df = pd.melt(df, 'X_Axis', var_name='cols',  value_name='vals')
g = sns.factorplot(x="X_Axis", y="vals", hue='cols', data=df)

Sample:

df = pd.DataFrame({'X_Axis':[1,3,5,7,10,20],
                   'col_2':[.4,.5,.4,.5,.5,.4],
                   'col_3':[.7,.8,.9,.4,.2,.3],
                   'col_4':[.1,.3,.5,.7,.1,.0],
                   'col_5':[.5,.3,.6,.9,.2,.4]})

print (df)
   X_Axis  col_2  col_3  col_4  col_5
0       1    0.4    0.7    0.1    0.5
1       3    0.5    0.8    0.3    0.3
2       5    0.4    0.9    0.5    0.6
3       7    0.5    0.4    0.7    0.9
4      10    0.5    0.2    0.1    0.2
5      20    0.4    0.3    0.0    0.4

df = df.melt('X_Axis', var_name='cols',  value_name='vals')
g = sns.factorplot(x="X_Axis", y="vals", hue='cols', data=df)