Hierarchy layout using sigmajs or gephi - gephi

Using SigmaJS or gephi toolkit, is it possible to create Hierarchy layout of the graph? I can't use linkurious.
I am currently using sigmaJS 1.2

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How can I implement such a schedule?

I am developing a graph in javascript and I need a similar graph
Specifically, I'm interested in the moment on the right where one graph transitions to the other transparent

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I have been tasked with drawing complex custom shape using mapbox-gl iOS library. The backend created using mapbox-gl-native codebase (as well as custom iOS SDK) provides the data on where the shapes should be drawn and what data should be displayed.
My initial thoughts are on implementing the drawing in mbgl-core library where the library fetches the style and parses out the parameters of layers. However I was unable to find any documentation on this topic.
So my questions are where should I be looking to write the code that does the drawing (presumably in C++ using OpenGL) and where is the code that parses the fetched style and layer parameters?

Gephi graph disappeared after adding few more nodes and edges

I am quite new to Gephi, but after reading the tutorials on the official page I manged to make a decent graph. However, after adding few more nodes and edges to the database (currently has 31 nodes and 45 edges -see below) and re-generating the graph from layout tab, the graph disappeared and the "Force Atlas" distribution won't stop loading. I tried with other layout distributions with same results and I also tried with the zoom to extents icon but nothing would show up.
Can anyone tell me why is this happening and how could I fix that?
I am attaching two csv files which contain an anonymized version of my nodes and edges:
Nodes.csv
Edges.csv
I have found a workaround in order to solve my problem: I ran the randomized layout (name may differ, as I am using a localized version), which results in a not so nice layout which fits in the screen (which is its main achievement). After that, I can run other distributions such as "Force Atlas" and nodes and edges would show up and fit on the screen.

How to implement waterfall graph in iOS

I want to implement waterfall graph in iOS I searched on internet but did't find anything. I want something like below image
you can use core-plot library to draw graphs.
this libary have bar plot,you can set barBaseValye to TRUE for using bar plot as waterfall graph.
coe-plot

How to add overview window on openstreet map

I'd like to implement map quality tool,
i am using open street map and leaflet JavaScript for rendering map,
i want to implement overview window on bottom left corner of map like in Google map,
any one suggest me any solution from past experience ?
i am using this environment : ruby 2.0.0 and rails 4.1.0
You can start with this leaflet plugin MiniMap: https://github.com/Norkart/Leaflet-MiniMap
In my opinion, it is not as good as GoogleMap overview map and there are a few bugs.
However, it is a good start

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