[R] normalised curve fitting with error bars

[Pooja Jain]

Hi David,

Sorry for not being absolutely clear.

x-axis will be the values ranging from (-50 to 50) and y-axis will be  
the density distribution as you would get after plotting every column  
fitted to the normal distribution. However, what I need here is to  
reduce the nine column file to a three column file. In the three  
column file, the first column should be the mean of every row of a the  
nine column file, the second column will be the maximum value of every  
row of the nine column file and the third column will be the minimum  
value of all of the values in every row of the nine column file.

Since the values in the nine column fits quite well to the normal  
distribution, I expect their mean to behave similar. So I would plot  
mean fitted to the normal distribution and would like to see for every  
mean value what is the error bar as defined by the min and max values.

Thank you for any help that you may extend in this matter.

Best regards,
-Pooja

On 3 Jul 2009, at 17:32, David Winsemius wrote:

>
> 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
>


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