interp1()

Core Math

interp1() is a MATLAB®-compatible core math function for 1-d interpolation. methods: 'linear' (default), 'nearest', 'cubic', 'spline'. returns nan for query points outside the data range. Run it online in your browser with SimLab — free, no install, no license required.

1-D interpolation. Methods: 'linear' (default), 'nearest', 'cubic', 'spline'. Returns NaN for query points outside the data range.

▶ Try interp1() in SimLab — Free

Syntax

interp1(x, y, xq)

interp1(x, y, xq, 'linear')

interp1(x, y, xq, 'nearest')

interp1(x, y, xq, 'spline')

Examples — run interp1() in your browser

interp1([0, 1, 2], [0, 2, 4], 0.5)

▶ Run

interp1([0, 1, 2, 3], [0, 1, 4, 9], 1.5, 'spline')

▶ Run

More Core Math Functions

Browse other free, MATLAB®-compatible core math functions in SimLab:

linspace()logspace()randn()rand()eye()zeros()

Browse all 510+ SimLab functions →

Frequently Asked Questions about interp1()

Is the interp1() function free to use in SimLab?

Yes. SimLab is 100% free — no signup, no license, and no usage limits. You can run interp1() and 510+ other MATLAB®-compatible functions directly in your browser at simulations4all.com/simlab.

Do I need to install MATLAB to use interp1()?

No. SimLab runs entirely in your web browser with zero installation. The interp1() function works without any MATLAB® license or software download.

What does interp1() do?

1-D interpolation. Methods: 'linear' (default), 'nearest', 'cubic', 'spline'. Returns NaN for query points outside the data range. It is a MATLAB®-compatible core math function available in SimLab with the same calling syntax as MATLAB® — typically: interp1(x, y, xq).

Can I run interp1() in my browser?

Yes. Open SimLab at simulations4all.com/simlab, write or paste code that calls interp1(), and run it. Execution happens locally in your browser — no data leaves your machine.

Try SimLab — MATLAB®-compatible, free, in your browser

510+ functions. Runs in your browser. No install. No license.

Open SimLab

MATLAB® is a registered trademark of The MathWorks, Inc. SimLab is an independent project by Simulations4All and is not affiliated with, endorsed by, or sponsored by The MathWorks, Inc.