Generate function plot data

Sample a restricted arithmetic expression at evenly spaced x coordinates and return plot-ready JSON.

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ToolFunction Plot Data Generator
Input
Output
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Preview

How it works

The expression accepts x, arithmetic, parentheses, and eight named Math functions, with caret translated to exponentiation. The closed interval includes both endpoints; non-finite evaluations become null instead of invalid JSON numbers.

  • One hundred one points supplies two endpoints and 99 interior samples, with an upper limit of 1,000.
  • Sampling is not adaptive and says nothing certain about the curve between coordinates.

Worked example

Generate function plot data
Input
											Expression: sin(x)
Min x: -3.14
Max x: 3.14
Points: 9
Output
												X       Y
------  ---------
-3.14   -0.001593
-2.355  -0.707951
-1.57   -1
-0.785  -0.706825
0       0
0.785   0.706825
1.57    1
2.355   0.707951
3.14    0.001593

When to use this

Lessons sample sine waves, chart components ingest x-y records, and numerical reviews locate sampled discontinuities.

Edge cases

  • log(x) at zero or a negative coordinate yields null.
  • A narrow peak between adjacent x samples can disappear from the result.
  • Implicit multiplication such as 2x and named constants such as pi are unsupported.

References