Interpolator

Find the corresponding value of y for a given x belonging to a table

Free App.

Very easy to use.

From 2 (Linear Intepolation) to 6 points FREE.

For estimating experimental values, when it is impossible or even impracticable

determine all values obtained by means of experiments.

Free linear interpolation and up to 6 points free.

Free Linear interpolation, cubic interpolation, quadratic interpolation FREE and much more !

No internet connection required. It works offline

Interpolation is one of the very old and basic techniques of numerical calculation.

Before the advent of computation, interpolation was widely used to calculate the values of transcendent functions. In general we have only a table with values of such functions for a certain set of arguments and, when it was necessary to calculate some value not tabulated, we resorted to the interpolation. Today, function interpolation is not used for these purposes, because even the simplest calculators give us the values of trigonometric, hyperbolic, exponential, and other functions. To any value within the domain of definition of such functions.

Currently the interpolation is very used for other cases where it is really difficult to calculate the value of the function or we still do not know the expression of the function, but we have a set of values that are usually obtained through experiments.

If you have any requests for additions / improvements, please post them

in comments and I will follow as much as possible.

The analytical expression of f (x) is not known, that is, it is known

only its value in some points. This situation occurs often in practice, when working with data and we need to manipulate f (x) as, for example, calculate its value at a point, its integral in a given interval, etc.

It is extremely complicated and difficult to handle. Then, at Sometimes, it is interesting to sacrifice accuracy for the simplification of calculations.

The requested permissions are necessary because there is a possibility of the PRO version (up to 12 points), and you need to connect to the Internet for purchase.

Other permission is required for the Google Play purchase process called "Google Play Billing Service" (very secure).

Network connections need to be displayed because there is a need for access the network for connecting to the Internet.

If you find our free version helpful, help us make more apps free, by buying our paid version. Invest in us !!! we keep

with the sale of paid App, in the PRO versions. Apps of great quality,  believe.

Get down.

Problem: Find the corresponding value of y for a given x not belonging to the table.

A solution is to obtain the function that relates the variables x and y.

▪ Polynomials are the most used functions to determine this

relation (simple functions).

▪ Interpolator polynomial (IP): built to approximate a function.

▪ This is enough to evaluate the function at the desired point.

▪ The PI is not only useful in obtaining intermediate values ​​in tables, but: in the numerical integration, in the calculation of equations and in solving ordinary differential equations.

▪ There are several methods for obtaining an IP from a set of data. The simplest scheme involves the solution of an LS (Linear System).

No more need for a calculator to interpolate manually.

Runs on any android device.

The interface is very friendly.

Interpolate data from tables for:

Thermodynamics

Steam tables

Fluid mechanics

HVAC

Engineering

Chemistry

Electronics

Physics

Math

Cargo surveyors working, etc.

Interpolator

From 2 to 12 points paid.