Importing a text file and then using "counting" approach

Question

KayLynn 2014-3-10

0
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https://ww2.mathworks.cn/matlabcentral/answers/120889-importing-a-text-file-and-then-using-counting-approach

评论： Sean de Wolski 2014-3-10

I am trying to import a text file into matlab. I tried using the following: A=xlsread ('temperature. txt')

Once I am able to import the data, I want to observe several different time intervals using a for loop (is this a counting approach) to record the frequency of the readings. I am given 7 different time intervals:

0 < t< 30

30<t<80

80<t<130

130<t<150

150<t<180

180<t<200

t>200

I am unsure how to put a less than or equal to sign in correct format ( basically I am trying to say that t is greater than or equal to zero but less than or equal to 30).

Do i have to write a for loop for each time point or is there a way to include all time intervale in one for loop to determine the frequency.