finding difference in matrix

A=[ 8.9724   14.5105    7.4390    8.3401   11.3161    5.5572     10.0719   
    1.8233    2.6026   26.3023   14.0506   29.8088   25.8791     23.3959   
    4.3403   24.1108   28.4506   13.5936   6.8717    0.8964      17.2434 ];   

I need to take 1st column and match with other column if the values are within a range of +/-10 from the column taken,for those mean must be taken

for example taking 1st col it doesnot have a difference of +/-10 with any other column,2nd,3rd dont have

4th and 7th have a difference of +/-10,i have to fine mean in row wise

8.3401     10.0719   

14.0506    23.3959   

13.5936    17.2434

mean is 

9.206

18.723

15.4185

same as 5th andd th has the difference,and have to find mean

finally i need output as  meanvalue and the column for which mean is not taken

so 1st,2nd,3rdcolumns,mean value1,meanvalue2 must be displayed

please help

[Azzi Abdelmalek]

Pat can you tell clearly what are the steps to follow. are you comparing just the first col with othetrs or what?

[Pat]

Azzi i want to compare all columns,and which are at a difference of +/- 10 ,i have to find mean,others i have to display as it is

In above example 4 and 7 are at a difference of+/- 10,and 5&6th are at difference of +/-10 do i have taken mean and others columns ehich are not at a fifferece of +/- 10 is displayes as it is (ex 1,2,3 col in above ex)

[Walter Roberson]

Do you mean 10, or 10% ? All of the values in the first column are within +/- 10 of each other, but not all of them are within 10% of each other. On the other hand you specifically identify column 4 and column 7, but 10.0719 is not within 10% of 8.3401 and 8.3401 is not within 10% of 10.0719. Your criteria is not at all clear.

[Pat]

walter not 10% it is a diference of +/-10,comparing 4th column and 7th column

8.3401     10.0719   

14.0506    23.3959   

13.5936    17.2434

they differ by a value of +/-10

5th and 6th column also differ at a difference of +/- 10;

for example  in 6th and 7th cannot be combined because the 3rd row value 
is greater than 10

Answer 1

[Matt J]

Once you have the differences, the rest should be easy:

A= bsxfun(@minus, A, A(:,1));

[Pat]

Matt u have subtracted 1st column from othere,this is not my output

[Matt J]

You said that the first step in your process is to see which columns are within +/-10 of the first column. subtracting the 1st column from the others would be a step in doing so. Taking it a step further, it might be useful for you to do

 all( abs(bsxfun(@minus, A, A(:,1)))<=10,1)  ;

[Pat]

But matt the value i get is

ans =

     1     0     0     0     0     0     0

what does it mean