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I'm trying to set the ticks (time-steps) of the x-axis on my matplotlib graph of a Pandas DataFrame. My goal is to use the first column of the DataFrame to use as the ticks, but I haven't been successful so far.
My attempts so far have included:
Attempt 1:
#See 'xticks'
data_df[header_names[1]].plot(ax=ax, title="Roehrig Shock Data", style="-o", legend=True, xticks=data_df[header_names[0]])
Attempt 2:
ax.xaxis.set_ticks(data_df[header_names[0]])
header_names is just a list of the column header names and the dataframe is as follows:
Compression Velocity Compression Force
1 0.000213 6.810879
2 0.025055 140.693200
3 0.050146 158.401500
4 0.075816 171.050200
5 0.101011 178.639500
6 0.126681 186.228800
7 0.150925 191.288300
8 0.176597 198.877500
9 0.202269 203.937000
10 0.227466 208.996500
11 0.252663 214.056000
And here is the data in CSV format:
Compression Velocity,Compression Force
0.0002126891606,6.810879
0.025055073079999997,140.6932
0.050145696,158.4015
0.07581600279999999,171.0502
0.1010109232,178.6395
0.12668120459999999,186.2288
0.1509253776,191.2883
0.1765969798,198.8775
0.2022691662,203.937
0.2274659662,208.9965
0.2526627408,214.056
And here is an implementation of reading and plotting the graph:
data_df = pd.read_csv(file).astype(float)
fig = Figure()
ax = fig.add_subplot(111)
ax.set_xlabel("Velocity (m/sec)")
ax.set_ylabel("Force (N)")
data_df[header_names[1]].plot(ax=ax, title="Roehrig Shock Data", style="-o", legend=True)
The current graph looks like:
The x-axis is currently the number of rows in the dataframe (e.g. 12) rather than the actual values within the first column.
Is there a way to use the data from the first column in the dataframe to set as the ticks/intervals/time-steps of the x-axis?
287
To plot the line chart, use the plot() method. To rotate the ticks at the x-axis, use the plt. xticks() method and pass the rotation argument to it.
MatPlotLib with Python To change the range of X and Y axes, we can use xlim() and ylim() methods.
You can use the xticks() and yticks() functions and pass in an array denoting the actual ticks. On the X-axis, this array starts on 0 and ends at the length of the x array. On the Y-axis, it starts at 0 and ends at the max value of y . You can hard code the variables in as well.
In this article, we will be looking at the approach to set x-axis values in matplotlib in a python programming language. The xticks() function in pyplot module of the Matplotlib library is used to set x-axis values. List of xticks locations. Passing an empty list will remove all the xticks.
This works for me:
data_df.plot(x='Compression Velocity', y='Compression Force', xticks=d['Compression Velocity'])
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