Christian Lawson-Perfect
Member of the e-learning unit in Newcastle University's School of Mathematics and Statistics.
Lead developer of Numbas.
I'm happy to answer any questions - email me.
Christian's activity
Christian Lawson-Perfect on Graphs: Write the adjacency matrix of this graph 3 years, 9 months ago
Saved a checkpoint:
Looks fine.
Christian Lawson-Perfect on Graphs: Write the adjacency matrix of this graph 3 years, 9 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Graphs: Match adjacency matrix to a graph 3 years, 9 months ago
Gave some feedback: Ready to use
Christian Lawson-Perfect on Graphs: Match adjacency matrix to a graph 3 years, 9 months ago
Saved a checkpoint:
Looks good!
I don't know if there's any more you could say in the advice. I suppose you could, for each graph that it isn't the adjacency matrix of, pick a row that doesn't match and explain why.
Christian Lawson-Perfect on Are these graphs isomorphic? 3 years, 9 months ago
Saved a checkpoint:
I'm uneasy about just showing drawings of the graphs. It's an accessibility problem, and occasionally the auto-layout puts vertices very close to edges, making it hard to see exactly how many edges there are.
Christian Lawson-Perfect on Are these graphs isomorphic? 3 years, 9 months ago
Gave some feedback: Needs to be tested
Christian Lawson-Perfect copied Graphs: Are these graphs isomorphic? to Are these graphs isomorphic? 3 years, 9 months ago
Christian Lawson-Perfect on R vectors 3 years, 9 months ago
Gave some feedback: Has some problems
Christian Lawson-Perfect commented on R vectors 3 years, 9 months ago
In parts b and d, I'd randomise the values of x and y, so you can't just write down the literal values given in the prompts.
This might be going over and above, but in part d if I answer
z <- y>55, I get a vector of booleans. Could you detect that with an alternative?