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# Setting only the lower or upper limit in Matplotlib

schedule Aug 12, 2023
Last updated
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PythonMatplotlib
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To set only the lower or upper limit for `plt.xlim(~)`, set either the `left` or `right` parameter:

``` plt.xlim(left=-2)plt.xlim(right=2) ```

For `plt.ylim(~)`, set either the `bottom` or `top` parameter:

``` plt.ylim(bottom=-2)plt.ylim(top=2) ```
WARNING

For the effect to apply, you must call `xlim(~)` or `ylim(~)` after plotting the curve (e.g. after `plt.plot(~)`).

# Example

Suppose we have the following parabola:

``` x = np.linspace(-3, 3, 1000)plt.plot(x, x**2) ```

The default output is as follows:

Our goal is to set the lower y-limit of graph to 0, and leave the upper y-limit intact. We can use the following snippet:

``` x = np.linspace(-3, 3, 1000)plt.plot(x, x**2)plt.ylim(bottom=0) # Make sure you call this after the plot(~) method ```

This gives us the following:

We see that our curve starts from `y=0` now.

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