if difference between two values is smaller than replace by
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I have a vector that contains several time values. For the application I need to check if the difference between two values is smaller than 3e-6. If that's the case the second (higher) value shall be replaced with the first.
My approach would be for-loops but maybe there is a smarter and more efficient way to solve this?
5 个评论
Dyuman Joshi
2023-10-22
编辑：Dyuman Joshi
2023-10-22
Are you taking the values adjacently/consecutively? or 1/2/.../n after the other? or randomly?
the cyclist
2023-10-22
Can you upload the data (or a small, representative sample)? You can use the paper clip icon in the INSERT section of the toolbar.
(There are several ways to store time values in MATLAB, and the syntax will be different depending on the data type.)
Kai
2023-10-22
移动：the cyclist
2023-10-22
Is each column processed independently?
It doesn't seem that any value is greater than the immediately preceding value by less than 3.e-6, but more than zero:
load("time.mat","time")
any((diff(time) > 0) & (diff(time) < 3.e-6),"all")
load("time.mat","time")
dt = diff(time);
dt = dt(dt ~= 0);
min(dt)
So in all cases where the difference in times is < 3e-6, the two values are already identical.
采纳的回答
Pratyush
2023-10-23
Hi Kai,
I understand that you have a vector, and if the difference between any two values is less than 3e-6, you want to set them both equal to the lesser of the two numbers. The following script could be used for that purpose:
% Sort timeValues vector
timeValues = sort(timeValues);
% Calculate the differences between adjacent values
diffValues = diff(timeValues);
% Find the indices where the differences are smaller than 3e-6
replaceIndices = find(diffValues < 3e-6);
% Replace the second value with the first for the identified indices
timeValues(replaceIndices + 1) = timeValues(replaceIndices);
Hope this helps.
1 个评论
Dyuman Joshi
2023-10-23
Note that this answer sorts the data before finding difference between consecutive elements.
OP has/had not specified anything in regards to that.
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