Scientific Mode Tutorial
In this tutorial, you operate in Scientific Mode and use Matplotlib and NumPy packages to run and debug a Java code with data visualization.
Before you start, ensure the following is installed:
Adding sample code
Create an empty Python project. Add a new Python file named
main.py by right-clicking the project root and selecting . Then add the following code the hte
import numpy as np import matplotlib.pyplot as plt N = 50 x = np.random.rand(N) y = np.random.rand(N) colors = np.random.rand(N) area = np.pi * (15 * np.random.rand(N))**2 # 0 to 15 point radii plt.scatter(x, y, s=area, c=colors, alpha=0.5) plt.show() X = np.linspace(-np.pi, np.pi, 256,endpoint=True) C,S = np.cos(X), np.sin(X) plt.plot(X, C, color="blue", linewidth=2.5, linestyle="-") plt.plot(X, S, color="red", linewidth=2.5, linestyle="-") plt.xlim(X.min()*1.1, X.max()*1.1) plt.xticks([-np.pi, -np.pi/2, 0, np.pi/2, np.pi], [r'$-\pi$', r'$-\pi/2$', r'$0$', r'$+\pi/2$', r'$+\pi$']) plt.ylim(C.min()*1.1,C.max()*1.1) plt.yticks([-1, 0, +1], [r'$-1$', r'$0$', r'$+1$']) plt.show()
Process warnings shown for the
matplotlib imports and enable the packages in the project.
Ensure that the Scientific mode is enabled ().
Run your scientific project. The code is executed and shows two graphs in the SciView. Clicking the preview thumbnail displays the respective graph:
You can modify the project code to plot only one graph at a time. In the scientific mode, you can execute fragments of your code by creating code cells.
To execute code cells:
- Modify the
main.pyfile by adding the "#%%" lines.
- In the left gutter, click the icon on line with the scatter plot cell mark. Only the scatter graph will be built.
- Now click the icon on the line with the y versus x plot cell mark. The corresponding graph should appear.
Let's put a breakpoint at the line:
This line appears twice in our example code, and so there will be two breakpoints.
Right-click the editor background and on the context menu choose Debug 'sample'.
The line with the first breakpoint is blue highlighted. It means that the debugger has stopped at the line with the breakpoint, but has not yet executed it. If we execute this line (for example, by clicking the button on the stepping toolbar of the Debug tool window), we'll see the graph:
Next, look at the Variables tab of the Debug tool window. If you click the
View as Array link nearby the
area array, the Data tab in the SciView window will open:
Mind the only row of figures in the Data tab in the SciView - it's explained by the fact that the
area array is one-dimensional.
Running in console
Right-click the editor background and choose the Run File in Console command:
This command corresponds to running a run/debug configuration for the
main.py file with the Run with Python console checkbox selected:
When this command is run, the
>>> prompt appears after the output in the Run tool window, and you can execute your own commands.
So, what has been done with the help of IntelliJ IDEA?
- The file
main.pywas created and opened for editing.
- The source code has been entered
- The source code has been run and debugged.
- Finally, we ran the file in console.