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how to assign weightage

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johnson saldanha 2018-11-12

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评论： johnson saldanha 2018-11-13

suppose i have a matrix x and the second row has values ranging from 0.2 to 102 and weightage has to be assigned to these depending on the mean. the values close to the mean should have highest weightage and progressively decrease as it goes farther.

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madhan ravi 2018-11-12

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give an example and your desired output

johnson saldanha 2018-11-12

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the example is the same. the values ranging from 0.2 to 102 in randomn order. totally there are more than 1000 values. the highest is 102 and lowest is 102. the mean is 67. the weightage should be given to these values. the weightage should be highest for the values close to the mean. it is okay if the values are put in bins and weightage is given depending the bins. the output should be such that 60-70 should have highest weightage and decrease as it goes farther.

johnson saldanha 2018-11-12

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after this i need to find the time for which values are constant.

johnson saldanha 2018-11-12

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as there are many set of values where the values are constant, i need to give different weightage to each set

Stephen23 2018-11-12

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Not difficult at all, but what function should the weighting have? Linear down to some minimum value? Logarithmic? Square root? Some other function?

Walter Roberson 2018-11-12

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What is to be done with the first row of the matrix?

johnson saldanha 2018-11-12

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the weighing factor could be in terms of 0.1 to 0.9 where later i can multiplty the time for which the values are constant. i also need the time for which it is constant

johnson saldanha 2018-11-12

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the values start from the first row itself

Walter Roberson 2018-11-12

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The values start from the first row but you have only defined processing the second row. Should we just discard the first row?

johnson saldanha 2018-11-12

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my bad. im sorry. theres a correction in the question. it should be second column instead of second row

johnson saldanha 2018-11-12

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the operation is to be done on the second column only

Walter Roberson 2018-11-12

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Okay what should be done with the first column?

johnson saldanha 2018-11-12

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discard it. i mean we have to access only the second column. and the description given is for the second column. thank you

johnson saldanha 2018-11-12

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any updates?

Walter Roberson 2018-11-12

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sort() on abs(x-mean(x)) and take the second output of sort to tell you the order.

johnson saldanha 2018-11-12

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second output of sort as in? its a column matrix ryt

Walter Roberson 2018-11-12

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在 MATLAB Online 中打开

[sorted_distance, sort_order] = sort(abs(x-mean(x))) ;

johnson saldanha 2018-11-12

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im sorry. i havent understood how its related to my problem statement

Walter Roberson 2018-11-12

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You said that the values closest to the mean should have the highest weight . sorted_distance tells you exactly how far values are from the mean, arranged in increasing distance . sort_order tells you what the original order was. For example if the first entry of sorted_distance is 0.063 and the first entry of sort_order is 19 then that tells you that the entry that was closest to the mean was aa distance of 0.063 from the mean and that it was the 19th row in the original data that had that entry .

Now it is up to you to decide how a particular distance from the mean shold be transformed into a weight .

johnson saldanha 2018-11-13