Step 5: Once you click on the OK button, that’s it. Click on the OK button to generate the graph. Once you click on that, you’ll see a visualization of your contour graph associated with the data selected. Step 4: Out of the 4 surface chart options available, click on the third chart, which is a contour chart. However, it also has some utilization under different branches such as Astrology, Meteorology in statistics, this type of chart is used to check the relationship between two predictors and response. Contour graphs are frequently used in Cartography which is more associated with geocoding of the regions. The values of Z in the graph are called contours. A contour graph can be used when we have two predictors X & Y, which have an impact on the response variable Z. Contour charts are similar to the surface charts that can be seen from above (any height) and are 2-D charts most of the time. In this chart, lines are drawn for (x, y) coordinates where the response (z) values are occurring. It does not store any personal data.Contour Plots in Excel (Table of Contents)Ĭontour Plots is the way in which you can represent the three-dimensional surface (having a length(X), Width(Y) and depth/volume(Z)) chart on a two-dimensional plane (i.e. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. Every contour set is a layer that can be hidden, shown again, or deleted in the Icy's "Layer" pane. You may uncheck the "Remove previous contour painters" option to draw several contours with different parameters (different masks, labels for only a subset of levels, etc.). To do so, enable the checkbox "Print levels lavels" and choose a satisfying fontsize. To remove the exterior from the contour display, we can use a mask sequence, of the same dimension as the original image, where the data is zero in the exterior region and non-zero in the inside region where the contours should be computed and displayed.įinally, it may be desirable to show labels to indicate the level values. In the above example, the interesting data lies inside a region at the center of the image, while the exterior intensities are zero. Sometimes displaying the contours on the whole image domain is not satisfying. In the example below, the image data goes from -0.4 to 0.4 roughly, and we have chosen to draw 13 levels from -0.35 to 0.35. Also open an image to use the plugin on.Ĭhoose the number of levels to draw, and the min/max level values. Once installed, open the plugin by clicking on its icon in the "Plugin" workspace.
Contour plot code#
The contouring algorithm is a port to Java of the code found in the GIST package, also used by other plotting tools like Matplotlib. Additionally, it can print level labels next to the contour lines.
This plugins computes and draws contour lines on top of a 2D sequence. Draws a contour plot on top of a sequence.