As discussed in the comments to the question, it’s not very clear exactly what epitaph‘s setup is, and for some reason s/he seems unwilling to clarify. But let’s suppose that the “graph” is actually simply represented by a distance matrix (which may possibly be what the mess of numbers and Xs in the question is … Read more
Probably the “mesh” is the one that will do for you. See the documentation for this for more, but you can try: x=linspace(….);y=… [x,y]=meshgrid(x,y); z= x^2 – 4*x + y^2 – y – x.*y mesh(x,y,z) solved What can I use MATLAB function “Plot3D”? [closed]
https://opendata.cityofnewyork.us/data/ Publicly available datasets are available, in xlsx format, that detail current zoning, events, shops, registrations, etc. for the city in the link above. import pandas as pd df = pd.read_excel (r’Path where the Excel file is stored\File name.xlsx’, sheet_name=”your Excel sheet name”) Utilize Pandas as an alternative for importing your data into Python. solved … Read more
I would start small, and build up. The smallest (n=1) is simply: * that clearly doesn’t work since there are 0 neighbors (and even number). So no solution exists for n=1. Next, try n=2. Only one choice: ** This works. Now what about n=3? Doesn’t work, no solution for n=3. Now, how can you add … Read more
In your main you define gh(5) which allocates the vector of size 5 then you use your addEdge method with parameter (5,6) which tries to access list[5] but the five list entries are list[0],list[1],list[2],list[3], and list[4]. So I guess gh.addEdge(5,6) gives the Segmentation fault as it is out of range of your vector. 0 solved … Read more
Can I put tags on the nodes? Are you referring to the following question?Drawing a network of nodes in circular formation with links between nodes A general method to add textual labels to a graph is to use the text command. Note that it requires the coordinates for each label. It’s also recommended to make … Read more
Take a look at the Google Charts API. You can use it to generate a URL that represents your graph. Simply download the image associated with that URL and you have your chart. 2 solved generating chart using python or google charts [closed]
Ok I finally found it. On the x axis I wanted to plot dates either as POSIXct or as number of day of recording (integer). On the y axis I wanted the time of day so that the graph would present a dark bar on each day (x-axis) and between the time (y-axis) that the … Read more
every time you call plot matlab will clean the canvas before drawing the new function, unless you are focused on a window where you called hold on, which will substantially tells Matlab to keep the old stuff and superimpose the new drawing. x = 0:0.001:10 y1 = x.^3; y2 = 3.^x; plot(x, y1); hold on; … Read more
Standard C++11 or C++14 does not have any graphics library. But you should consider using Qt, a free software cross-platform GUI library for C++. I guess that you’ll be happy in using Qt graphics view framework. You could also consider some other, perhaps OS specific, widget toolkit. Or just output a 2D graphics using libcairo. … Read more
I’ll try to break this down to essentials. But first let me commend you for tackling a problem that’s “known” to be enormously hard. No progress can be made without risk taking. You are approaching TSP in terms of a recursive expression for S(a, b, I), the length of a shortest path from city a … Read more
Without any more constraints, there aren’t any available optimizations that aren’t kind of obvious. A path exists iff u, v, and w are in the same connected component. That can be easily determined by running a BFS or DFS from any one to see if it finds the other two. For some graphs there is … Read more
Firstly, language choices aren’t the most massive issue in the world, in my opinion. Unless you have a requirement to use a specific language or on portability, using either C++ or Java will be sufficient. Having said that, your question seems somewhat homework-ish. Are you using Prim’s algorithm for your MST implementation? As other answers … Read more
This can be solved with a breadth first search (BFS) in the graph. This algorithm gives you back a tree whose root is the city you start with and the unique path from there to any other node/city is the one with the fewest possible hops. If you need this information for all your cities/nodes … Read more
So, does an int function return 1 by default? No. There is no default return value (except for main, which returns 0 by default.) It returns garbage value. Correct. More correctly: The behaviour of the program is undefined. But then why it is returning 1 here!!! Because the behaviour is undefined. I think you misunderstand … Read more