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feynman1
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In MATLAB one can 'hold off' to remove a previously drawn thing on the same graph. How about in python?
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Thanks very much. I want to draw 2 things in the same graph and show them 1 at a time (1st appears, 1st vanishes, 2nd appears...). I used plt.hold('off') but it was reported as an error.jedishrfu said:Your intent is to draw multiple traces on the same plot?
It would depend on the choice of plotting software accessed by python. A common one is matplotlib where it is possible. These examples may help:
https://www.programcreek.com/python/example/56588/matplotlib.pyplot.hold
Seems that hold(), obsolete, is no longer recognized.pbuk said:When you are using a library like matplotlib you should refer to the API documentation provided by the developers. Using an IDE also helps as it will describe the arguments used by API methods.
from matplotlib import pyplot as plt
# Note the , in the next line: pyplot.plot returns a list and we
# want the first element which is a collection of 2DLines.
currentPlot, = plt.plot([1, 4, 9, 16])
# This will remove the collection of lines from the plot.
currentPlot.remove()The 'hold off' equivalent in Python is the pass statement. It is used as a placeholder and does nothing, allowing the code to continue without throwing an error.
The pass statement should be used when a statement is required syntactically, but no action is needed. This can be useful in situations such as defining empty classes or functions that will be filled in later.
A comment is used to provide information or explanation to a human reader, whereas the pass statement is a valid line of code that has no effect on the program's execution. Comments are usually ignored by the interpreter, while pass statements are executed.
Yes, you can use the pass statement multiple times in your code. However, it is important to note that using too many pass statements can make your code difficult to read and maintain.
Yes, there is an alternative to the pass statement in Python. You can also use the Ellipsis object, which is represented by three consecutive dots (...). Like pass, it does nothing and can be used as a placeholder in code.