QGIS statistics plugin description.
The goal of Statist is to provide some basic statistics in text and graphical (frequency distribution histogram) form for the selected field of the vector layer. Both numeric (integer, real, date) and text (string) fields are supported. You can work with the whole layer or only with selected records.
You can get this plugin from official repository.
The plugin is designed for QGIS version 1.0 and higher. It also depends on matplotlib — Python 2D plotting library. If you want to use this plugin you need to install matplotlib first. If there is no matplotlib in your system, you'll see error message on QGIS startup.
For those who use OSGeo4W online installer obtaining and installing matplotlib very simple. Matplotlib package available through under Libraries. In other case you can download it from project home page (http://matplotlib.sourceforge.net) and install manually.
You can obtain sources from our SVN:
svn co http://svn.gis-lab.info/statist statist
After the plugin installation and startup by clicking button
main window will appear:
В окне присутстсвуют такие элементы:
Statistics computation begins immediately after user selects a field from the list, the progress of this operation is showed with progressbar. After computation plugin window will look like this
Some controls change their state and some new controls appear:
Most of the above explanations are from the matplotlib manual (chapter 4 Interactive navigation).
Navigation toolbar is located below the plot area.
You can use it to navigate through the figure. Here is a description of each of these buttons.
|Home. Similar to the web-browser Home buttom. It returns you to the first, default view of your data. Use Pan/Zoom and Zoom-to-rectangle to define new views.|
|Back. Similar to the web-browser Back button. Used to navigate back between previously defined views. Have no meaning unless you have already navigate somewhere else using the pan and/or zoom buttons. This is analogous to trying to click Back in your web-browser before visiting a new page — nothing happens.|
|Forward. Similar to the web-browser Forward button. Used to navigate forward between previously defined views. Have no meaning unless you have already navigate somewhere else using the pan and/or zoom buttons.|
|Pan/Zoom. This button has two modes: pan and zoom. Click the toolbar button to activate panning and zooming, then put your mouse somewhere over an axes.|
Press the left mouse button and hold it to pan the figure, dragging it to a new position. When you release it, the data under the point where you pressed will be moved to the point where you released.
|Zoom-to-rectangle. Click this toolbar button to activate this mode. Put your mouse somewhere over and axes and press the left mouse button. Drag the mouse while holding the button to a new location and release. The axes view limits will be zoomed to the rectangle you have defined.
There is also an experimental "zoom out to rectangle" in this mode with the right button, which will place your entire axes in the region defined by the zoom out rectangle.
|Subplot-configuration. Use this to configure the parameters of the subplot: the left, right, top, bottom space, space between the columns and space between the rows. In Statist this button enabled but you don't need to click on it. There are no subplots, so there is nothing to configure. Later I'll completely remove this button.|
|Save. Click this button to launch a file save dialog. You can save plot in following formats: PNG, PS, EPS, SVG and PDF.|
If you want report a bug or want make suggestion — use bugtracker.
Последнее обновление: 2014-05-14 20:22
Дата создания: 03.08.2009
Автор(ы): Александр Бруй