problem in neighbors function
显示 更早的评论
hello,
This is my graph
G=[0 1 1 0 0 0;1 0 1 1 0 0; 1 0 0 1 1 0; 0 0 0 0 1 0; 0 0 0 0 0 1; 0 1 0 1 1 0];
when I apply the function neighbors
neighbors(G,active_nodes_last_round(individual));
where active_nodes_last_round(individual)=1;
I got the following error:
Undefined function 'neighbors' for input arguments of
type 'double'.
Error in IC_paper1 (line 26)
potential_infected=neighbors(G_duplicate,active_nodes_last_round(individual));
Thanks in advance
回答（1 个）
Steven Lord
2022-7-27
0 个投票
The neighbors function, in this context, requires its first input to be a graph object not an adjacency matrix. Create a graph object from your adjacency matrix by calling graph and pass the resulting object into neighbors.
13 个评论
huda nawaf
2022-7-27
编辑：huda nawaf
2022-7-27
Steven Lord
2022-7-27
The graph object was introduced in release R2015b (as was the neighbors function.)
Are you using an earlier release?
If you're using release R2015b or later, what do these two commands display?
which -all graph
which -all neighbors
huda nawaf
2022-7-27
Steven Lord
2022-7-27
Don't tell me what they displayed. Show me. Please copy and paste the exact output you see from those two commands into a comment. Also show me what release you're using (copying and pasting the output from the following call would be an easy way to do so.)
version
huda nawaf
2022-7-27
Steven Lord
2022-7-27
You won't be able to use any of the graph and network algorithm functionality included in MATLAB as of release R2015b (including the neighbors function for graph objects.) You're using an older release of MATLAB. You would need to upgrade to release R2015b or later.
huda nawaf
2022-7-28
Walter Roberson
2022-7-28
huda nawaf
2022-7-30
Walter Roberson
2022-7-31
No. Those toolboxes are not exact replacements for the MATLAB graph functions.
The idea is that possibly you could rewrite whatever algorithm you are trying to do, in terms of the functions provided by one of those toolboxes.
If you need drop-in replacements for neighbors() and the other MATLAB graph-theory functions, then you should upgrade your MATLAB to at least R2015b.
huda nawaf
2022-8-1
Steven Lord
2022-8-1
If you've purchased a license for the later releases you should have received instructions on how to download and install it in an email from Mathworks. Or you could go to the "Download Products" section on the Support section of the website, or you could click on the Get MATLAB button in the upper-right corner of this page.
huda nawaf
2022-8-2
编辑：huda nawaf
2022-8-2
类别
在 帮助中心 和 File Exchange 中查找有关 Introduction to Installation and Licensing 的更多信息
2022-7-27
2022-8-2
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
