how to use interp1() function with half data

x=half(0:5);

y=x.^2;

interp1(x,y,5)

Error using matlab.internal.math.interp1

Sample values must be of type double or single.

Error in interp1 (line 188)

VqLite = matlab.internal.math.interp1(X,V,method,method,Xqcol);

How to use interpolation with half or even shorter types?

Answer 1

[Sam Chak]

Hi @li, If you double the data, it works.

x=half(0:5)

x = 

  1×6 half row vector

     0     1     2     3     4     5

y=x.^2

y = 

  1×6 half row vector

     0     1     4     9    16    25

interp1(double(x), double(y), 5)

ans = 25

[li]

Thanks.Due to the lower memory, the data inputted must smaller than 16bits,so doubled the data can't solve the probelm.

[Sam Chak]

Hi @li

I see. Could you possibly perform the interpolation in another system and then transmit the interpolated data back in 16-bit format? I am merely exploring the possibilities.

If all else fails, you may need to perform the interpolation using basic arithmetic operators. I have verified that the plus, minus, times, and rdivide functions can handle int16 data.

[li]

Great! I had tried your method,it works.

[Matt J]

@li If so, please Accept-click the answer.