topic Re: Need help with fitting data with an existing varaible in Statistical Procedures

Need help with fitting data with an existing varaible

gx2144 — Sun, 23 Aug 2020 19:19:21 GMT

Hi, I had a series of functions that I obtained from previous studies and I wanted to apply these functions to my data. And I also wanted to test if these functions fit our data. Could anyone give some hints on the coding ?

Appreciated.

Re: Need help with fitting data with an existing varaible

PaigeMiller — Sun, 23 Aug 2020 19:22:16 GMT

"Functions" is somewhat vague. Can you be specific?

And I also wanted to test if these functions fit our data.

Again, please be specific about what you mean by "test if these functions fit our data".

Re: Need help with fitting data with an existing varaible

gx2144 — Sun, 23 Aug 2020 19:31:14 GMT

The equations were:

R5 (KPa/L/s) = −3.841167 × logHeight + 8.671580;

R20 (KPa/L/s) = −2.546561 × logHeight + 5.841867;

X5 (KPa/L/s) = −0.000097 × Age + 1.018597 × logHeight − 2.343672.

I had a data set that contains these variables(height, age, R5,R20,X5) and I wanted to apply these functions on my data set. And I wanted to see if these equations fit my data.

If this makes sense to you.

Re: Need help with fitting data with an existing varaible

PaigeMiller — Sun, 23 Aug 2020 19:41:35 GMT

Okay, here's some untested code using the natural logarithm (base e) of the value of Height

data want;
    set have;
    R5  = −3.841167 * log(Height) + 8.671580;
    R20 = −2.546561 * log(Height) + 5.841867;
    X5 = −0.000097 * Age + 1.018597 * log(Height) − 2.343672;
run;