Python: plt.plot(x,y) ValueError: Unrecognized character S in format string

Question

Quarter is seasonal data, such as '2009Q1','2010Q4'... Size is a float data, such as '12.1', '14.3' ... The data type is as below:

Quarter                            object
Size                              float64

While I try to plot these two columns, there is an error:

plt.plot('Quarter','Size')   
plt.show()

Error:

ValueError: Unrecognized character S in format string

Does it mean I need to transfer the season data to another format? I do not know how to change the type. Thanks!

izb · Accepted Answer · 2018-09-13 17:25:58Z

3

To plot your data, you have to pass the variables into the function parameters, whereas you are passing strings that are the same as the variable names. To plot the actual data:

// this
plot(Quarter, Size)

// NOT this
plot('Quarter', 'Size')

To use the axis labels, you have to run plot like:

plot('xlabel', 'ylabel', data=obj)

Just put your data object into the function and it should plot it how you like. Otherwise look here for documentation on plotting.

answered Sep 13, 2018 at 17:25

izb

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