Pandas multiple dataset plot error

Question

I have multiple datasets that I need to be plotted on the same axes. Just an example of the datasets are: Dataset 01 as two separate lists:

Waves          Values
340            520
341            532
342            536
.              .
.              .
2500           720

Dataset 02 as a dataframe df:

Wavelength      Data
320             560
350             572
.               .
.               .
2650            780

My attempt at the plot is as follows:

fig,ax=plt.subplots(figsize=(15, 10))
ax = plt.plot(x = Waves , y = Values)   # list names
df.plot(ax=ax, x='Wavelength', y='Data')
plt.show()

I get the following error:

AttributeError: 'list' object has no attribute 'get_figure'

ImportanceOfBeingErnest · Accepted Answer · 2018-08-10 19:51:33Z

3

You redefine the axes ax, created in the first line, to be a list of lines via ax=plt.plot(..). Remove this redefinition.

fig,ax=plt.subplots(figsize=(15, 10))
ax.plot(Waves, Values)
df.plot(ax=ax, x='Wavelength', y='Data')
plt.show()

edited Aug 10, 2018 at 19:51

answered Aug 10, 2018 at 18:34

ImportanceOfBeingErnest

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2 Comments

Brain_overflowed Over a year ago

this did get rid of the error, but it doesn't plot the (x= Waves, y = Values) at all....just the df.plot (only the blue line plot in my sample output pic)

ImportanceOfBeingErnest Over a year ago

Sorry, I just copied that from your code without testing as there is no minimal reproducible example. The problem is that matplotlib plot's x and y argument are no named arguments.

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