How do you analyze a contour plot?
Interpreting Contour Plots and Finding Combinations that Produce Good Outcomes. Use a contour plot to explore the relationship between three variables. These plots display two independent variables (X, Y) and one dependent variable (Z). Contour plots help identify combinations that yield beneficial outcome values.
What is contour interpretation?
The ‘wiggly brown lines’ on a map are contours. Contours are a sophisticated way of showing the shape of the land. Contours on orienteering maps are typically drawn every 5m of height. ( A feature the height of a typical house with a pitched roof, would be shown by two contours.
How do you explain a surface plot?
A surface plot is a three-dimensional wireframe graph that is useful for establishing desirable response values and operating conditions. A surface plot contains the following elements: Predictors on the x- and y-axes. A continuous surface that represents the fitted response values on the z-axis.
What does it mean if contours are closely spaced?
steep slope
Closely spaced contour lines indicate a steep slope (Figure F-1). 2. Widely spaced contour lines indicate a gentle slope (Figure F-2). Evenly spaced contour lines indicate a uniform slope (Figure F-2), while irregular spacing indicates an irregular slope (Figure F-1).
How do you read elevation contour lines?
You can figure out the elevation of any point by finding the nearest labeled line, counting the number of lines above or below it, multiplying by the contour interval, and adding or subtracting the result from the nearest marked contour line. The more closely spaced the contour lines, the steeper the slope.
What do jagged contour lines represent?
** Jagged, rough contours indicate large outcrops of rocks, cliffs, and fractured areas.
What do contour plots show?
Contour plots (sometimes called Level Plots) are a way to show a three-dimensional surface on a two-dimensional plane. It graphs two predictor variables X Y on the y-axis and a response variable Z as contours. These contours are sometimes called z-slices or iso-response values.
How do you read a 3D surface plot?
A 3D surface plot is a three-dimensional graph that is useful for investigating desirable response values and operating conditions. A surface plot contains the following elements: Predictors on the x- and y-axes. A continuous surface that represents the response values on the z-axis.
What are contour plots used for?
What do Widely spaced contours tell us?
Given that the two images are from a map of the same scale, we can state that where the contours are closer together, the slope is steeper. Closer spacing of contours tells us that elevation is changing faster over distance, in other words, a steeper gradient. Wide spacing of contours indicates flat terrain.
How can I smooth my contour line in contour plot?
In order to smooth the lines in a contour plot you need to smooth the data in the matrix it is plotted from. Do this by using the Analysis: Signal Process: Smooth from the Origin menu. This will perform a smoothing routine on your data and the associated contour plot will become smooth with the new values.
Is it possible to do contour plots?
The contour lines we use to make a contour plot are a set of all x and y values which, together, produce a specific z-value. If you’re working with some other 3D graph then, you’ll want to check to find which values of x and y together produce z. The easiest way to do this is to set a fixed value for one variable and then solve for the other.
What is an overlaid contour plot?
Overlaid contour plots allow you to visually identify an area of compromise among the various responses. Each overlaid contour plot consists of a pair of continuous variables (one for the x axis, one for the y axis). If there are more than two continuous variables, the additional variables are held at a fixed level.
What are the different types of contour lines?
The main types of lines are horizontal lines, vertical lines, perpendicular lines and parallel lines. Other categories of lines include diagonal lines, curved lines, contour lines and continuous lines.