How to use one data set to find the mean of another?

3 次查看(过去 30 天)
I have a data set (neighbors) and a data set (height) where I need to find the mean of the height of the plants that have 1 neighbor.
If say my Neighbors data set is 2,1,4,1,6,7,3,1 and my height is 12.5,17,10,4,16,20.4,13.2,9.4 . How do I compare these two? My thought is to use NON=find(Neighbors==1) and somehow use the designated spots to correlate it to height, but I don't know how. Please let me know if there is another way to do this. I've only been using Matlab for 1 week and have been using youtube a lot for help. Thanks.
NON=NumberOfNeighbors
PLCm=PlantHeightcm
find PLCm when NON=1
Error using find
Second argument must be a positive scalar integer.

采纳的回答

Chunru
Chunru 2021-9-1
编辑:Chunru 2021-9-1
neighbors = [2,1,4,1,6,7,3,1];
height = [12.5,17,10,4,16,20.4,13.2,9.4 ];
% find the entries with 1 neighbour
idx = neighbors == 1;
% use logic index to get the heights with 1 neigbour and find mean
a = mean(height(idx))
a = 10.1333
% or in one line
a = mean(height(neighbors==1))
a = 10.1333

更多回答(1 个)

Jeff Miller
Jeff Miller 2021-9-1
NON1 = NON == 1; % this makes a boolean vector that is true for the positions where NON==1
mean(PLCm(NON1)); % this computes the mean of the PLCm values in those positions

类别

Help CenterFile Exchange 中查找有关 Matrix Indexing 的更多信息

产品

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by