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What is a linear interpolation?

Updated: 11/4/2022
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Suppose you know the density of some (strange) substance at 10oC and 20oC, 125 gm/cm3 and 145 gm/cm3.

You want to know its density at, say, 13oC. You could use linear interpolation.

To do so, you first find the linear function that satisfies the points (10, 125) and (20, 145). I think it's D=105 + 2t.

Now since 13 is between the temperatures for which we have data we can interpolate: 105 + 2(13) = 131 or 131 gm/cm3.

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Q: What is a linear interpolation?
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What is linear interpolation used for?

Linear interpolation is used as a method used in mathematics of constructing a curve that has the best fit to a series of points of data using linear polynomials.


What is meant by Piecewise linear interpolation?

Interpolation in general is a way to determine intermediate values from a set of coordinates. Linear interpolation would be to fit a single linear function to the entire set of coordinates. Piecewise linear interpolation would then be to determine intermediate values from the set of coordinates by fitting linear functions between each set of coordinates. Connect-the-dots so to speak.


How are gaps in a sequence filled in?

What you are asking is not precisely clear, but in general missing data is filled in by a process of interpolation. eg. Linear interpolation is a method of curve fitting using linear polynomials to construct new data points within the range of a discrete set of known data points.


What are the uses of interpolation in statistics?

Linear Interpolation (Statistics) Below is a Frequency Table of the Lengths, to the nearest minute, of phone calls made from an office one day.Length (min)-----------------Frequency0 - 2 --------------------------------- 83 - 5 --------------------------------- 116 - 9 --------------------------------- 1610 - 15 ----------------------------- 1416 - 20 ------------------------------ 9> 20 ---------------------------------- 3


Interpolation program using matlab?

To create an interpolation program using MATLAB, you can use the built-in functions such as interp1 or interp2 for one-dimensional or two-dimensional interpolation, respectively. These functions allow you to specify the input data points and the desired interpolation method (e.g., linear, cubic, spline) to generate interpolated values. You can then use the interpolated values for further analysis or visualization tasks.

Related questions

What is linear interpolation used for?

Linear interpolation is used as a method used in mathematics of constructing a curve that has the best fit to a series of points of data using linear polynomials.


What is meant by Piecewise linear interpolation?

Interpolation in general is a way to determine intermediate values from a set of coordinates. Linear interpolation would be to fit a single linear function to the entire set of coordinates. Piecewise linear interpolation would then be to determine intermediate values from the set of coordinates by fitting linear functions between each set of coordinates. Connect-the-dots so to speak.


What are the advantages of linear interpolation?

Advantages over what? For what? Generally linear interpolation is done because one infers that the relationship between points is linear and/or it is the the easiest kind of interpolation. In the absence of data or theory to help you infer the relationship between points the principle of parsimony suggest that use the simplest that gets the job done - linear.


What is the formula for linear interpolation?

pu = p0 + u(p1 - p0)


What is the process of predicting values between the graphed points on a line?

The process is called interpolation, which applies a computed formula of the line to a given x or y value. (More specifically, it is "linear interpolation".)


How are gaps in a sequence filled in?

What you are asking is not precisely clear, but in general missing data is filled in by a process of interpolation. eg. Linear interpolation is a method of curve fitting using linear polynomials to construct new data points within the range of a discrete set of known data points.


What are the uses of interpolation in statistics?

Linear Interpolation (Statistics) Below is a Frequency Table of the Lengths, to the nearest minute, of phone calls made from an office one day.Length (min)-----------------Frequency0 - 2 --------------------------------- 83 - 5 --------------------------------- 116 - 9 --------------------------------- 1610 - 15 ----------------------------- 1416 - 20 ------------------------------ 9> 20 ---------------------------------- 3


What are the advantages and disadvantages of the bisection method compare with that of the linear interpolation method?

The bisection method is simpler to implement and guarantees convergence to a root if one exists within the initial interval, but it can be slower as it always halves the interval. In contrast, linear interpolation converges faster but does not guarantee convergence, and it might fail if the function is not well approximated by a linear model in the interval.


Interpolation program using matlab?

To create an interpolation program using MATLAB, you can use the built-in functions such as interp1 or interp2 for one-dimensional or two-dimensional interpolation, respectively. These functions allow you to specify the input data points and the desired interpolation method (e.g., linear, cubic, spline) to generate interpolated values. You can then use the interpolated values for further analysis or visualization tasks.


What is the plural form of Interpolation?

The noun interpolation (determine by comparison) has a normal plural, interpolations.


How is the interpolation factor found?

The interpolation factor is simply the ratio of the output rate to the input


Who was this 17th century English mathematician invented term interpolation?

interpolation theorem, discovered by Józef Marcinkiewicz