问题
so i have this matrix
data =
1
3
4
3
5
2
5
i need to get new data by subtracting the element like this
data2-data1
data3-data2
data4-data3
data5-data4
data6-data5
data7-data4
...
datan-data(n-1)
so from that data the output should be im =
2
1
-1
2
-3
3
i still trying to manipulate this code but got an error
clc
data=[1;3;4;3;5;2;5]
cnt=size(data,1)
for i=1:cnt;
im=(data(i)-(data(i-1)));
end
im
回答1:
diff
does what you want.
diff(data)
BUT if you want to continue with your approach, I imagine the error you get is related to data(i-1)
cannot be defined when i = 1
. Your loop should be 2:cnt
.
Another method would be data(2:end) - data(1:end-1)
来源:https://stackoverflow.com/questions/42896839/matlab-subtracting-matrix-elements