7/5/2023 0 Comments Igor pro afm analysis![]() ![]() I suppose that to set SampleRate -> SetScale/P x 0,0. Then following your advice, I should set "make / N = 30000 " for the number ofdata points to be acquired in 30 seconds, but the "sample rate" and "duration" as I configure them ? ![]() Unfortunately I have no tutor to ask for clarification. But Igor can do a lot and its well documented.)ĭear HJDrescher, thank you for your support, I'm reading the manual, but there are some steps that I have not clear, unfortunately, are a student novice and is the first time that I work with this program and I look out the programming. I strongly recommend to read the manual (I know there are many pages. you can also use the sqrt ( variance ( wavename ) ) functions as mentioned in the wavestats help. Thanks to all, now I understand how to set the frequency with you your examples !Ĭalculate the number of data points you need (30 000) from the sample rate (1000 1/s) and the duration (30 s).Ĭall Wavestats on your data wave and the std.dev. Your new number of data points seems odd: The first example records for 10s the second one for 200s (time=DataPoints * dx) You can use appendtograph to add 'waves to a graph' (actually you don't add the data but a reference to the data) It is not necessary to display the waves again Igor updates the graphs if the data is changed. You can make waves with a new name or use the duplicate command to store a copy. If you use the make command twice the old waves will be overwritten. If you set dx to 0.01 it means 100 samples per second: 100Hz and so on. Membrane proteins are an important class of proteins in biology and therapeutics. If you set dx to 1 it means 1 sample per second: 1Hz. The NIDAQ assumes you want 10 points to be sampled in 1 s with constant temporal spacing. If you set dx to 0.1 you have 10 points in the interval [0,1[. The increment dx is the spacing of the data points. With the /P flag for the setscale command you give a start value and an increment for the wave's x axis. I would also suggest to read chapter II-5 about waves in the Igor manual. SetScale/P x, 0,1 "s", Deflection, TorsionĠ.1 is the frequency of 1Hz, while 0,0.1 = 10Hz ? Secondly, I re-adjust the number of data points in the wave, then set the new wave scaling: Bioz Stars score: 86/100, based on 1 PubMed citations. SetScale/P x, 0,0.1 "s", Deflection, TorsionĭAQmx_Scan/DEV="dev4" WAVES="Deflection, 2 Torsion, 3 " Afm Analysis Software Igor Pro, supplied by wavemetrics inc, used in various techniques. I assume you will first have to readjust your number of data points in the wave, then set the wave scaling to your altered sample frequency and start the acquisition AGAIN (and maybe you want to keep a copy of the other data). Your example will change the sample rate from, 10Hz to 1Hz. The NIDAQ package READS the DX value from the wave scaling and sets the sampling frequency to this value. This is actually quite simple to explain (and was actually mentioned twice):
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