Have you looked at this tutorial on bar3? Sign up using Facebook. Post Your Answer Discard By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of service , privacy policy and cookie policy , and that your continued use of the website is subject to these policies. In fact this is what bar3 internally does. I think the default C can be one solid colour as your function creates now. And here’s what you get at the end: Choose a web site to get translated content where available and see local events and offers. If Z is a matrix, elements from the same row in Z appear at the same location along the y -axis.

Email Required, but never shown. Or say you wanted to color the bars using gradient according to their heights:. Sign up or log in Sign up using Google. Click the button below to return to the English version of the page. In MATLAB, the ‘OpenGL’ renderer will interpolate colors along the RGB colorspace, whereas the other two renderers ‘Painters’ and ‘ZBuffer’ will interpolate across the colors of the current colormap used so the histogram bars would look like mini colorbar s going through the jet palette, as opposed to a gradient from blue at the base to whatever the color is at the defined height as shown above. Great solution for Matlab – but it looks like bar3 doesn’t exist for Octave:

## What is close to bar3?

How can I do this? Note that I chose to color all the bars in a single solid color similar to the output of the hist3 functionwhile MATLAB emphasizes the columns of the matrix with matching colors.

Dan – can you check this on Octave? Default octavve of display is ‘detached’. Each is surrounded by zeros, which are also plotted at each bin edge.

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Select the China site in Chinese or English for best site ploh. By default, the style is detached. Can you explain your faces matrix?

Below is a function I implemented that acts as a bar3 replacement partially. Description bar3 draws a three-dimensional bar graph. What about using interp2 plit nearest neighbours interpolation to resample your data from 3-by-3 to say by and then just use surf?

LineSpec bar bar3h barh. The default width is 0. All Examples Functions More.

Dan 37k 10 55 Load the data set count. At least I sorta showed how to do some of it in the examples: Here is a octve post where I tried to explain the structure of the data constructed by bar3. And here’s what you get at gar3 end: The colour is set octage be based on the bin values and is applied to the 4 points and the surrounding zeros. This solution generates a surface in a similar way to the internals of Matlabs hist3d function.

Stack Overflow works best with JavaScript enabled. Click here to see To view all translated materials including this page, select Country from the country navigator on the bottom of this page. But why not incorporate the colouring bars by height as a C-data extra parameter to the function? This page has ocgave translated by MathWorks. When Z is a vector, the y -axis scale ranges from 1 to length Z.

The y values can be br3, but cannot contain duplicate values. The function could have been implemented by specifying coordinates of connected vertices that form polygons, by using the XDataYDataZData and CData properties instead of the Vertices and Faces properties.

When Z is a matrix, the y -axis scale ranges from 1 to the number of rows in Z. See this post for more details.

I didn’t use anything more sophisticated than colormapsurf and patchwhich to my knowledge should all work ploot in Octave. Each bar is multicolored, with colors corresponding to distinct elements and showing the relative contribution each row element makes to the total sum.

### Octave – General – What is close to bar3?

By clicking “Post Your Answer”, you acknowledge that you have read our updated terms of serviceprivacy policy and cookie policyand that your continued use of the website is subject to these policies. Dan I didn’t realise they were so similar. Sign up using Facebook. If you run the examples I showed above, you’ll find that some of the advanced 3D features are not yet implemented correctly in Octave this includes transparency, lighting, and such.

Dan is octave able to process this code? Such approach usually requires larger data to define the patches because we cant have shared points across patch faces, although I didn’t care much about that in my implementation. Dan a face is a list of vertices, I suspect that octave does not support non-planar faces and therefore all faces here are triangles 3 vertices.

Trial Software Product Updates. Click the button below to return to the English version of the page. It is easy to customize the patch though; Here is an example to match bar3 coloring mode by using indexed color mapping scaled:. Plus decide whether C should be used to specify gradients, or for bars with flat colors. Syntax bar3 Z bar3 Y,Z bar I would like to draw a 3D histogram with gnuplot or octave in order to represent my data.

Group the elements in each row of Z by specifying the style option as grouped. In MATLAB, baar3 ‘OpenGL’ renderer will interpolate colors along the RGB colorspace, whereas the other two octae ‘Painters’ and ‘ZBuffer’ will interpolate across the colors of the current colormap used so the histogram bars would look like mini colorbar s going through the jet palette, as opposed to a gradient from blue at the base to whatever the color pllot at the defined height as shown above.