Why do I keep getting "Error using plot Invalid data argument."

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Ashley 2023-8-26

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2013542-why-do-i-keep-getting-error-using-plot-invalid-data-argument

评论： Walter Roberson 2023-8-27

采纳的回答： Voss

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%Inputs
prompt1 = 'What is Tc?'
Tc = input(prompt1)          % In degrees F
k = 0.342;
Prompt2 = 'What is Tr?'
Tr = input(Prompt2);  % In degrees F
Prompt3 = 'What is Ti?'
Ti = input(Prompt3);  % In degrees F
t = -1/k.*log((Tc-Tr)/(Ti-Tr))  % Equation for amount of time taken
time = linspace(0,t*2)       % Time vector
Tc = Tr + (Ti - Tr)*exp(-k*t)   % Equation for fridge temp
plot(time,Tc, 'r', 'd')

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采纳的回答

Voss 2023-8-26

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https://ww2.mathworks.cn/matlabcentral/answers/2013542-why-do-i-keep-getting-error-using-plot-invalid-data-argument#answer_1294337

编辑：Voss 2023-8-26

Linespec (style, color, marker) should be specified as a single argument:

plot(time,Tc, 'rd')

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Walter Roberson 2023-8-27

在 MATLAB Online 中打开

Unless, that is, you use name-value pairs, such as

plot(time, Tc, 'Color', 'r', 'Marker', 'd')

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