How to delete elements considered in a loop?

2019 2 6
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更新时间：2019 2 6
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Please in matching values of two similar arrays using a for loop, how do I delete elements that meet the matching criteria for an element in the reference array so its mot matched twice.

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回答（1 个）

Star Strider
Star Strider 2019-2-6

0 个投票

I am not certain what you are doing or what your arrays are. However, the ismembertol (link) function is likely the function that will do what you want. Let it do the looping and duplicate checking.

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Christopher Ibeh
Christopher Ibeh 2019-2-6
I tried to use ismembertol but got got the error below:
With the ByRows option, the DataScale value must be a scalar or a vector with the same number of elements as
columns in A.
Error in match (line 61)
[LIA,LocAllB] = ismembertol(B, A, 0.1, 'ByRows', true, ...
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
Below is the code i used.
%Import initial particle configurations and attributes data from excel
data0=xlsread('LM.xls','Sheet1');
%Import second particle configurations and attributes data from excel
data1=xlsread('LM.xls','Sheet2');
A=data0;
B=data1;
[LIA,LocAllB] = ismembertol(B, A, 0.1, 'ByRows', true, ...
'OutputAllIndices', true, 'DataScale', [1,Inf])
Star Strider
Star Strider 2019-2-6
编辑：Star Strider 2019-2-6
In the documentation discussion on 'DataScale', the ‘A’ and ‘B’ arrays both have 2 columns. It appears that your arguments have different column sizes that that, so a 2-element 'DataScale' vector is not appropriate. Your 'DataScale' value vector has to have the same number of columns as your data. If you want to use 'DataScale' with vectors, use the method in the documentation section on Specify Absolute Tolerance (link).
EDIT — (6 Feb 2019 at 20:28)
I still don’t know what you are doing, however investigate the setdiff (link) and intersect (link) functions to see if they will do what you want.
Christopher Ibeh
Christopher Ibeh 2019-2-6
I appreciate your response.
But for the nature of data i have, there are two arrays of 12 columns each. The colums contain particle coordinates and properties.
I intend to match the rows on one array to corresponding rows of the other array, with tolerance value for some of the atributes as conditions for a match.
Please, can i achieve this with ismembertol? or do you know of a better way i can achieve it?
Thanks

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