seaborn.catplot 在更改 x 和 y 的值时出现 ValueError

Question

I'm writing a python script to plot how status fluctuate between s0 and s2 as time going on. My input look like this:

timestamp|servo

0|s0

1|s0

2|s2

3|s0

4|s2

5|s0

6|s0

The way I wrote my input csv is like this:

headers = ['timestamp', 'servo']
with open(('/home/ray/proj/5th_output/asym/slave/test/' + str(testname) + '.csv'), 'w', newline='') as csvfile:
    spamwriter = csv.DictWriter(csvfile, fieldnames=headers, delimiter='|')
    spamwriter.writeheader()

    for i in range(0, len(eachservo)):
        row = {'timestamp': str(ts[i]), 'servo': eachservo[i]}
        spamwriter.writerow(row)

The way I plot my csv input is like:

    for csvname in glob.glob(os.path.join(path, '*.csv')):
        readcsv = pd.read_csv(csvname)
        sns.set(style="ticks")
        g = sns.catplot(x=timestamp, y=servo, data=readcsv)

The plot I got is correct in terms of the content, but the title of x and y is completely messed up:

However, if I change sns.catplot(x=timestamp, y=servo, data=readcsv) to sns.catplot(x='timestamp', y='servo', data=readcsv) , it will report a valueError saying ValueError: Could not interpret input 'timestamp' , so I'm stucking with using two lists as parameter for catplot.

What mistake am I making here? Is it the way I wrote csv causing this issue or I miss some catplot argument?

EDIT:

I found where my problem is, it's because I use csv.DoctWriter to write a csv and then panda for reading it. I solved it by replacing csv.DoctWriter with pandas to_csv .

Answer 1

I found where my problem is, it's because I use csv.DoctWriter to write a csv and then panda for reading it. I solved it by replacing csv.DoctWriter with pandas to_csv .

By using csv.DoctWriter with delimiterto = '|' write and use pd.read_csv , the column in the csv will be read as timestamp|servo instead of timestamp and servo .