For details, see How to Use.
2D Graph Tool for Plotting Expressions of the Form of "y = f(x)"
This VCSSL program is a simple tool which plots the expression (formula) of the form of "y = f(x)" to the 2D graph.
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How to Use
Download and Extract
At first, click the "Download" button at the above of the title of this page by your PC (not smartphone). A ZIP file will be downloaded.
Then, please extract the ZIP file. On general environment (Windows®, major Linux distributions, etc.), you can extract the ZIP file by selecting "Extract All" and so on from right-clicking menu.
» If the extraction of the downloaded ZIP file is stopped with security warning messages...
Execute this Program
Next, open the extracted folder and execute this VCSSL program.
For Windows
Double-click the following batch file to execute:
For Linux, etc.
Execute "VCSSL.jar" on the command-line terminal as follows:
java -jar VCSSL.jar
» If the error message about non-availability of "java" command is output...
How to Use After Executing the Program
Windows and UI
The following two-windows will be launched. The left one is the input-window, and the right one is the graph-window.
Input an Expression to Plot
At first, please input an expression you want to plot into the text field labeled with "y(x) =" at the top of the input-window. There are some points to write the expression:
- Use small character for "x".
- Arithmetic operations such as "+" and "-" are available. However, some symbols of operators are different with handwriting expressions. Use "*" for multiplication, and use "/" for division.
- Multiplication and division are prior in calculation order than addition and subtraction.
- You can mathmatical functions such as "sin" and "cos" in the expression. The value of circle ratio is available as "PI" (capital character).
- The exponentiation operator is "**". For example, x2 should be written as "x**2" in the expression.
Plot a Graph
After inputting the expression, please click "PLOT" button at the middle of the input-window, and the expression will be plot to the 2D graph.
The graph will be drawn as a lines-and-points* graph of "x-N" nodes. You can modify the value of "x-N" on the input-window. Larger value of "x-N" makes graph more smooth.
* If you plot lines-only graph, please see Other Features.
Plot new Expressions over the Current Graph
If you want to plot other expressions over the current graph, simply modify the expression of "y(x) =" text-field, and click again "PLOT" button. The new expression will be plotted over the current graph by using a different color.
Clear All Contents of the Current Graph
If you want to clear all contents of the current graph, please click "CLEAR" button at middle of the input-window.
Other Features
With the default settings, the graph will be plotted as a lines-and-points graph. If you want to plot a lines-only graph, please disable the checkbox of "With Points" from the "Option" menu at the top of the graph-window. In addition, if you want to change the width of lines, please disable and re-enable "With Lines" option, and you will be asked the line width.
You can modify other settings from "Edit" menu at the top of the graph-window, e.g. X & Y ranges of the graph, labels of X & Y axes, legends for each lines of the graph, etc.
You also can save settings and save the image of the current graph, from "File" menu at the top of the graph-window.
The 2D graph software "RINEARN Graph 2D" is used as the graph-window of this program. If you like UI and operability of the graph-window of this program, please try to use RINEARN Graph 2D for your data-analysis use.
» More Details
Code
This code is written in VCSSL.
License
The license of this VCSSL / Vnano code (the file with the extension ".vcssl" / ".vnano") is CC0 (Public Domain), so you can customize / divert / redistribute this VCSSL code freely.
Also, if example code written in C/C++/Java are displayed/distributed on Code section of this page, they also are distributed under CC0, unless otherwise noted.
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