[R] normalised curve fitting with error bars

[David Winsemius]

On Jul 3, 2009, at 11:56 AM, Pooja Jain wrote:

> Dear List,
>
>
> My data consist of nine columns and about 50,000 rows. It looks like  
> this.
>
> -9.0225	3.46464	2.80926	-0.3847	3.73735	1.1058	-2.98936	 
> 1.38901	-8.1846
> -2.4315	-5.1189	1.8225	3.3798	1.7874	4.693	-3.9286	1.4266	5.7849
> -3.4894	-4.0305	3.7879	3.5195	2.9186	2.8685	-6.126	4.978	4.9381
> 4.5282	3.62558	-3.0455	4.6518	1.39746	0.68652	3.5708	-3.6404	-4.2963
> -1.3183	0.6752	-4.0382	-2.5386	-0.6459	1.0689	-0.6392	-6.4141	-4.101
> -1.3735	3.1098	-2.8291	-5.2548	-3.3798	1.3959	-1.8605	0.1522	2.1818
> -1.0488	0.1071	-3.7154	-1.3748	-5.6218	-0.9989	-2.6763	-4.6548	0.5449
> 7.948	2.0673	3.8729	8.0537	2.79	-3.6963	8.4584	-1.5122	-6.3354
> 4.5827	6.1787	-3.1787	1.4554	5.6973	5.3386	10.6077	-0.0424	3.3653
> 4.1653	8.0266	1.9509	4.2077	5.4182	4.1797	7.9248	1.1502	0.753
> 3.6046	3.6743	11.8299	9.5704	10.7384	8.675	4.9277	13.6898	13.3279
> 18.4431	12.3946	22.1126	22.7109	19.4623	17.3565	15.27	17.5922	19.5873
>
>
> The values in each of the nine columns are almost normally  
> distributed but have slightly different heights of nine normalised  
> bell shaped plots.
>
> I was trying to plot each row as a point with error bars. The  
> central point will be the mean of the nine values in each of rows  
> and the max and min of the row will be the upper and lower bound of  
> the error bar.  I expect a normally distributed plot with spikes  
> around. Can any one please help me plotting data in this way ?
>
> Many thanks for any input.
>

I am confused about what is desired. First you describe the  
distributions of the full dataset's columns. Then you ask for a plot  
by rows, but you say it will be a normally distributed plot (which it  
is not). What are the x-axis and y-axis supposed to be?

David Winsemius, MD
Heritage Laboratories
West Hartford, CT