To demonstrate how the model and algorithm work, we apply them to study the pulse wave signal. We apply the recently developed adaptive non-harmonic model based on the wave-shape function, as well as the time-frequency analysis tool called synchrosqueezing transform (SST) to model and analyze oscillatory physiological signals. Wu, Hau-Tieng Wu, Han-Kuei Wang, Chun-Li Yang, Yueh-Lung Wu, Wen-Hsiang Tsai, Tung-Hu Chang, Hen-Hong
EXTRACT 1D WAVE FROM 2D WAVE IGOR PRO UPDATE
You can select Always Update so that all chages are applied automatically but be carefull when working with large marices.Modeling the Pulse Signal by Wave-Shape Function and Analyzing by Synchrosqueezing Transform. You can change intensity the scale by modifying Z-min and Z-max values. Matrix addressing is described in more details here. If your matrix contains regions without much information or too noisy, consider making a sub-range copy of the original matrix and displaying that copy. Surface plot does not allow you to limit the range or change scaling of X- and Y-axis. If you have 1000x200 points matrix, you may want to display every 10th point on X-axis and every 2nd point on Y-axis, for example. To make display faster you can increase X-Step and Y-Step values. Keep in mind that matrix may contain a large or very large amount of data, which will take time to process and display. To optimize display choose Parameters from Controls drop-down list. Click Update button to display what you have selected. If you do not see what you are looking for you probably did not load it correctly. Note that only matrix waves willbe diplayed.
From source drop-down menu choose your wave. Click on Source button and choose Matrix of Z-values. It has functionality of a dialog.įirst step is to select data to be displayed. Selecting Surface plot above brings Surface Graph window. There are several ways to visualize matrix data in Igor, although Image plot and Surface plot are the most pratical. If you want to plot time profile, however, you will have to set row range to a single number and specify a range of columns, as in wave0.ĭisplaying a whole matrix is useful occasionaly to get overal impression of data. If you want to plot spectra, for example, you will only need to change column number from 0 to the column number of interest. Note that when a matix is added to the list of waves to be plotted, Igor uses entire row range ( x, typically wavelength) and the first column ( y, typically time) as a 2D subrange by default: wave0. It is your responsibility to make sure that such data combination makes sense. For example SomeWave as X wave will work for either row of the example above. You can choose if you want to plot a column ( ) or a row ( ), but number of points in calibration wave must match or be limited by sub-range. Note that in the example above wave0 is a matrix and dialog specifies that column 0 of that matrix should be plotted vs row position wave RP_wave0, whcih was created when matrix was loaded. Moreover, you can plot an individual row or column of a matrix vs a wave or a row/column of another matrix. In this mode you can specify individual pairs of waves, choose separate axis for different wave pairs and limit ranges of data that you want to be dipalyed. To switch to advanced mode click More Choices button. New Graph or Add Traces dialogs allow greater chioce and flexibility if needed. Remove dialog simply allows you to choose which wave to remove. Select Append Traces to Graph or Remove from Graph:Īppend dialog is identical to dialog above for creating a new graph.
Activate the graph of interest - submenu Graph will appear inthe main menu. You can freely shuffle traces displayed on a graph. Then select a calibration wave on the right:Īfter clicking on Do It button you will get a graph where each data point from My_Sample01 wave is displayed at X position from corresponding point in wln_clb wave.
Select waves you want to plot on the left. You can select several Y waves by holding Shift key, but only one X wave can be selected. This will help you to locate it later on.Ĭlick Do It button and you will get a graph showing values in your wave. The most common left vs bottom is the default. Select your wave on the left and leave _calculated_ highlighted on the right.įrom Axis drop-down menus choose how you want data to be displayed.
EXTRACT 1D WAVE FROM 2D WAVE IGOR PRO WINDOWS
Open a New Graph dialog from Windows menu: You get a 2D plot with little information along X axis. In simple graph you display wave values sequentially or per scaling if it has been set. Visual representaion as a graph of one sort or another is one of basic, and most used, applications of Igor. Making graphs in Igor Plotting waves in Igor
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