CODEWITHSUNDEEP
matlabplot
jjepsuomi
jjepsuomi

Reputation: 4373

How to change the X-axis from milliseconds into hours in Matlab

I have some data measured every 500 milliseconds, you can see my data in the following image:

enter image description here

Now what I would like to do, is to convert the X-axis into hours instead of milliseconds. How can I do this in Matlab? How can do this generally if I want for example minutes? days? etc.

Thank you for your help =)

Upvotes: 0

Views: 2085

Answers (2)

SHWB
SHWB

Reputation: 21

If you have 100 data collected every 500 ms and you simply rescale the X axis to hours, you'll still get 100 data but as they had been collected every hour.

For example, suppose you have 3600 data collected every second.

data = rand(1,3600); 
time_s = 1:3600;

Now, suppose you want to plot the data every minute. Without any processing, you could get every 60th sample in the data array.

data_m = data(1:60:3600);
time_m = 1:60;

Doing this way, you'll get a consistent plot.

(I'd attach images but I lack reputation)

Upvotes: 2

am304
am304

Reputation: 13876

Well, that's pretty easy. Assume your vector is time_ms, to get it in hours, you just need:

time_h = time_ms/(1000*3600);

Then instead of doing something like:

plot(time_ms,my_data)

Just do:

plot(time_h,my_data)

Upvotes: 4

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