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| R2012a Documentation → Bioinformatics Toolbox | |
Learn more about Bioinformatics Toolbox |
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| Contents | Index |
msviewer(MZ , Intensities)
msviewer(..., 'Markers', MarkersValue)
msviewer(..., 'Group', GroupValue)
| MZ | Column vector of common mass/charge (m/z) values for a set of spectra. The number of elements in the vector equals the number of rows in the matrix Intensities. |
| Intensities | Matrix of intensity values for a set of mass spectra that share the same m/z range. Each row corresponds to an m/z value, and each column corresponds to a spectrum or retention time. The number of rows equals the number of elements in vector MZ. |
| GroupValue | Either of the following:
Each value or string specifies a group to which the corresponding spectrum belongs. Spectra from the same group are plotted with the same color. Default is [1:numSpectra]. |
msviewer(MZ , Intensities) displays the MS Viewer, which lets you view and explore a mass spectrum defined by MZ and Intensities.
msviewer(..., 'Markers', MarkersValue) specifies a list of marker positions from the mass/charge vector, MZ, for exploration and easy navigation. Enter a column vector with MZ values.
msviewer(..., 'Group', GroupValue) specifies a group to which the spectra belong. The groups are specified by GroupValue, a vector of values or cell array of strings. The number of values or strings is the same as the number of rows in the matrix Intensities. Each value or string specifies a group to which the corresponding spectrum belongs. Spectra from the same group are plotted with the same color. Default is [1:numSpectra].
The MS Viewer includes the following features:
Plot mass spectra. The spectra are plotted with different colors according to their group labels.
An overview displays a full spectrum, and a box indicates the region that is currently displayed in the main window.
Five different zoom in options, one zoom out option, and a reset view option resize the spectrum.
Add/focus/move/delete marker operations
Import/Export markers from/to MATLAB workspace
Print and preview the spectra plot
Print the spectra plot to a MATLAB Figure window
MSViewer has five components:
Menu bar: File, Tools, Window, and Help
Toolbar: Zoom XY, Zoom X, Zoom Y, Reset view, Zoom out, and Help
Main window: display the spectra
Overview window: display the overview of a full spectrum (the average of all spectra in display)
Marker control panel: a list of markers, Add Marker, Delete Marker, up and down buttons
Load and plot sample data
load sample_lo_res msviewer(MZ_lo_res, Y_lo_res)
Add a marker by pointing to a mass peak, right-clicking, and then clicking Add Marker.
From the File menu, select
Import Markers from Workspace — Opens the Import Markers From MATLAB Workspace dialog. The dialog should display a list of double Mx1 or 1xM variables. If the selected variable is out of range, the viewer displays an error message
Export Markers to Workspace — Opens the Export Markers to MATLAB Workspace dialog. You can enter a variable name for the markers. All markers are saved. If there is no marker available, this menu item should be disabled.
Print to Figure — Prints the spectra plot in the main display to a MATLAB Figure window
From the Tools menu, click
Add Marker — Opens the Add Marker dialog. Enter an m/z marker.
Delete Marker — Removes the currently selected m/z marker from the Markers (m/z) list.
Next Marker or Previous Marker — Moves the selection up and down the Markers (m/z) list.
Zoom XY, Zoom X, Zoom Y, or Zoom Out — Changes the cursor from an arrow to crosshairs. Left-click and drag a rectangle box over an area and then release the mouse button. The display zooms the area covered by the box.
Move the cursor to the range window at the bottom. Click and drag the view box to a new location.
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