Convert my data to milliseconds

Hello everyone, I have two LFP datasets. The first is sampled at 20 kHz and the second one at 1250 Hz. What should I do to convert each timestamps to milliseconds?

[Nora Khaled]

could you explain what type of data you have and what outcome you want to achive?

[Walter Roberson]

are the timestamps explicit or implied?

[Lari Sa]

Basically I have a matrix with values like: [ -0.26048, -0.30589, -0.87793, -0.69617, -0.71184, -0.39588, -0.5507, 0.11976....], so they indicate voltage fluctations, and each row is a different trial. I have been told that I need to convert these timestamps in milliseconds, but one dataset is sampled at kHz (20 kHz) and second one at Hz (1250 Hz). So far, I am just multiplying each value by 1000, but there must be something wrong because I still can't compare them!

Answer 1

[Walter Roberson]

milliseconds = (sample number minus 1) / sampling frequency, times 1000