Time interval between two time of Max

[vigwin@yahoo.com]

Hi,

    I need to find the difference between two consecutive 'Time of Max' in the statistics block... I appareciate greatly if any body could help me... Am actually finding the interval between the two consecutive peaks in ppg.

[GerdW]

Hi vigwin,

"I need to find the difference between two consecutive 'Time of Max' in the statistics block"

To get the difference I would use a simple subtract function!

Maybe a small feedback node could help here too...

You should learn to write better questions!

You should attach a VI instead of just a short description!

What is a "statistics block"?

What is "ppg"?

[vigwin@yahoo.com]

Thanks for your reply... By the way ppg is photoplethysmography.

I need to find the interval between two consecutive peaks. Am not able to efficiently find by this vi.

And one more question is how to read the datas and construct the waveform from the datas in excel or text file?

[vigwin@yahoo.com]

Am getting datas only in excel or txt format physionet website. I need to know how to construct the waveform signal using those values..?

[Joseph_Loo]

take a look at peak detector vi.

[vigwin@yahoo.com]

I tried that too...... I need to know whether my vi is right in calculating the interval between two peaks.....

I have attached my vi too.....

[Joseph_Loo]

You have about 68k points. The way you are reading your points in show there are breakage poings via the gap on your charts (probably re-reading the header each time). This may or may not be a problem in your process except some of the points are at your peak.

Why don't you read all the points in and  then process the data. The locations that are returned would then give your timing locations in one single run.

The peak detector does it own smoothing since it does its own interlopation. The accuracy is not at the actual point itself.

[vigwin@yahoo.com]

Could you explain briefly?

You mean to remove the collector function right?

How you found out that there are 68k points...?

May i know please?

[Joseph_Loo]

Just read all the data in at one time so you have a single collector point.

Take a look at your data file. It has about 68k lines in it. I just took a text editor that has the line count. Just went to the end.