Combinining the values from a image

2012 11 19
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I have 7 matrix(30x30 in which there are only 3values) ,and i have used tabulate command for finding the percentage so for each matrix i get percentage values such as
50.1%A
31.7%B
18.2%C these 3 for 1st matrix
11.5%A
19.8%B
68.8%C for 2nd matrix and so on
now i want to combine all A's ,B's ,C's if values are sane or +-5,i want to make it as single value instead of many,i want to reduce the number of values
please help

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Walter Roberson
Walter Roberson 2012-11-19
Suppose you have 10 and 14 and 18. Should those all get merged together, even though 10 is more than 5 away from 18 ?
Also, what should the output look like?

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回答（2 个）

Matt J
Matt J 2012-11-19

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See the accumarray() command

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kash
kash 2012-11-19
Matt can you please provide a example for above i went throygh documentation bu could not get any right opt for my question of using it
kash
kash 2012-11-19
I need to reduce those 7 set of values to around 4 or 5sets ,please can help me
Matt J
Matt J 2012-11-19
编辑：Matt J 2012-11-19
Give a small example of input and the desired output.

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Matt J
Matt J 2012-11-19

0 个投票

HISTC may also be what you want, but it seems like you've already used a similar command to histogram the ABC values. If so, it's not clear what further reduction you're looking for.

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kash
kash 2012-11-19
if there are 7 images or matrices, imagine we get 7 topics like this
img1: 80.1%,9.9%,10%
img2: 80%,10%,10%
img3: 79.5%,10%,10.5%
img4: 65%,20%,15%
img5: 67%,19%,14%
img6: 73%,17%,10%
img7: 72%,16%,12%
now we can club these probabilities to create topics for this example we can create 3 topics
img1,img2,img3 can be combined and we can give 1 topic for it
img 4,img 5 can be combined to form one topic
img6,img 7 can be combined to form one topic
therefore totally 3 topics
Matt J
Matt J 2012-11-19
编辑：Matt J 2012-11-19
Define a "topic". Also, give a quantitative input/output example (a small one) of the operation you want to perform
kash
kash 2012-11-19
now i want to combine images which are similiar or with a difference of + or - 5,after combining i will get 3 or 4 sets of values
the output will be for example
60.5%Green land
25.5%Others
14 %Others1..like these need 3 or 4 sets of values
Walter Roberson
Walter Roberson 2012-11-19
Suppose you have 10 and 14 and 18. Should those all get merged together, even though 10 is more than 5 away from 18 ?
kash
kash 2012-11-19
s it can be combine
kash
kash 2012-11-19
i have following values in command window as
33.2%Green land
26.1%Others
40.7%Others1
41.3%Green land
22.9%Others
35.7%Others1
25.3%Green land
8.5%Others
66.1%Others1
23.2%Green land
40.3%Others
36.5%Others1
35.5%Green land
35.5%Others
29.0%Others1
19.1%Green land
20.5%Others
60.3%Others1
now i want to combine images which are similiar or with a difference of + or - 5,after combining i will get 3 or 4 sets of values
the output will be for example
60.5%Green land
25.5%Others
14 %Others1..like these need 3 or 4 sets of values
Walter Roberson
Walter Roberson 2012-11-19
If 10, 14, 18 should all be combined, then the implication is that all groups are potentially combined into a single group even though the top and bottom values might differ substantially. You would allow 1:5:36 to all combine into a single group.
kash
kash 2012-11-19
walter ten how to combine to get atlest 3 to 4 groups as i have posted
Walter Roberson
Walter Roberson 2012-11-19
Your values might all be the same, making it impossible to split them into 3 to 4 groups.
Not enough of your values might be within 5 of each other in order to split into as few as 4 groups.
Pat
Pat 2012-11-19
walter same values with difference of + or _ 5 can be made into groups
Pat
Pat 2012-11-19
ok walter can we do in this way ,take means of all values so we get seven means values ,then find mean with greater difference and display those 3 values

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kash
kash
2012-11-19

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