I have a an array.I need to find its index value.How can i do that?

 Accepted Answer

KALYAN ACHARJYA
KALYAN ACHARJYA on 6 Oct 2019
Edited: KALYAN ACHARJYA on 6 Oct 2019
>> array_data=2:3:30
array_data =
2 5 8 11 14 17 20 23 26 29
Case 1: I assumed you are looking for index value of specific element in the array, say 17
idx=find(array_data==17)
Case 2: for all array Elements
idx=1:length(array_data)
Hope it helps!

10 Comments

Silpa K
Silpa K on 12 Oct 2019
Is it possible to find the label value using this.
KALYAN ACHARJYA
KALYAN ACHARJYA on 12 Oct 2019
Edited: KALYAN ACHARJYA on 12 Oct 2019
label value means?
Can you elaborate with example?
Silpa K
Silpa K on 12 Oct 2019
If I have a dataset that contain 137 rows.I need to find the label value of each row.
Unfortunately you forgot to provide the example KALYAN asked for. Please do so.
What is the label of each row? Is the label of row 87, 87 and the label of row 123, 123? If each label is just the index (i.e. row number), you could do
labels = 1 : size(m, 1);
Silpa K
Silpa K on 12 Oct 2019
I have the following dataset ,In this dataset 1 st column is the set of labels that corresponding to the row.I need th find the labels row by row.
The first column contains 1s and 2s. I am not clear on what you mean by finding the labels row by row?
T = readtable('ECGFiveDays_TRAIN.xlsx','readvariablenames',false);
labels = T{:,1};
Silpa K
Silpa K on 12 Oct 2019
Find the label of 1st row next finding the label of second row or finding label of a specific row.
After the code I posted had been executed, the label of first row would be labels(1). The label of second row would be labels(2). The label of the K'th row would be labels(K).
Silpa K
Silpa K on 13 Oct 2019
Thank you sir.
Answer Credit Goes to @Walter Sir

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