• January 14th 2010, 03:55 AM
jpnikam
Can any one please tell me?

“How to calculate coefficient of independent variable in non linear regression?”

For example I want to calculate value of y

Y=a + b*x1 + c*x2 + d*x3

Here;

Y= Dependant variable
a, b, c, d = constant

x1, x2, x3= independent variable.

In this case how to calculate value of a, b, c and d. If you have any idea please tell me how to calculate it
• January 14th 2010, 08:15 AM
matheagle
I'm not sure what you're asking either.
This is linear regression and it seems that you want to find the estimates of those constants.
• January 14th 2010, 10:33 PM
jpnikam
yes....i wanted to calculate values of constants(coefficients). but for non-linear equation.
• January 14th 2010, 10:35 PM
matheagle
well that model is linear
What is your NON linear model that you want to use to estimate the data?
• January 14th 2010, 10:40 PM
jpnikam
my equation is

y=a*e^(b*x)

e=exponential
y=defendant variable
x is independent variable
a and b are constant
• January 14th 2010, 10:53 PM
matheagle
Quote:

Originally Posted by jpnikam
my equation is

y=a*e^(b*x)

e=exponential
y=defendant variable
x is independent variable
a and b are constant

defendant rests?

just take the log

$\ln y=\ln a +bx$ is linear and use what you know to estimate these constants