Problem 55760. Reproduce this plot!

Created by Renee Coetsee
Appears in MATLAB Fundamentals - Plotting and Visualization

Difficulty:Rate

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Write a function that will take a dataset (x,y), a best fit model (model), and the upper and lower prediction bounds (lb,ub) for the model and produces a plot exactly like the one above. Your function should return the figure handle as output.
To run the function, use these variables for x, y, model, lb, and ub.
    x = 0:10;
    y = [1.08459242882334	15.6947129993263	14.2386103675462	6.42746590257512	31.1493692505068	28.3500898661844	36.6199801626288	32.7960413139854	48.8539622750404	40.0146245913800	53.5578609728933];
    model = [14.5329684874318	15.1878864648738	16.5582980455985	18.6442032296059	21.4456020168959	24.9624944074686	29.1948804013239	34.1427599984619	39.8061331988826	46.1850000025860	53.2793604095720];
    lb = [8.0385 9.3470 10.9611 13.0581 15.7997 19.2858 23.5490 28.5567 34.2089 40.3441 46.7849];
    ub = [21.0274 21.0287 22.1555 24.2303 27.0915 30.6392 34.8408 39.7288 45.4033 52.0259 59.7738];

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Last Solution submitted on Apr 06, 2025

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Christian Schröder on 18 Dec 2023

@luxintenebris It's possible for a test suite to include code before the first test; this is run when a solution is evaluated, but isn't shown as part of the tests.

Sam on 19 Dec 2023

@Christian Schröder In that case, should there be some check that it always runs? Or just include it in the suite? I had to call the function in the scratchpad first before the assertions could be properly handled.

Christian Schröder on 19 Dec 2023

@luxintenebris The "hidden" code should always run since it's part of the test suite as far as the Cody engine is concerned, even if it's not shown on the web frontend.

And yes, this can be annoying because you then can't simply copy tests to the scratchpad to check your solution before submitting. At least in this problem, the hidden code doesn't do anything beyond setting the same variables given in the problem description, and calling the function.

That said when you submit your solution using the scratchpad should never be necessary, hidden test suite code or not.

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Problem 55760. Reproduce this plot!

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Problem 55760. Reproduce this plot!

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