On 04/27/2013 11:32 PM, triutami....@gmail.com wrote:
Dear Sir,
Yes, I want to generate the data by two Gaussian but mean from one of them
generatated from polar its coordinates. I am confused about the algorithm? I know
how to generate two Gaussian data with certain mean&covariance matrix using
mvnorm but what about mean from its polar coordinates?
Thanks for your help.
Hi Iut,
If you mean transforming a normal (Gaussian) variate into polar
coordinates, it is not too hard:
polar.norm<-180+rnorm(100,0,10)
You can alter the "mean" point by changing the constant value and the
extent to which the tails wrap around the circles with the third
argument to "rnorm". Be aware that large negative and positive values
will "wrap around" to the polar values of the opposite sign depending
upon the variance of the normal variate.
Jim
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