Question about multimodal parameter estimation



Hi all,
i have some data and looking at them i suppose are generated by a gamma
distribution plus a normal distribution, in fact the look like this figure:

*
**
**
***
***
**** ****
******* ********
******************************

(i hope you can read it :) )

How can i estimate the parameter of the distribution of my data? I read
about MLE, but i can't find example that uses multimodal ditributions...

thanks for any advice,
nelson

.



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