error using linspace: input must be scalars

Question

Heera 2020-12-8

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/687794-error-using-linspace-input-must-be-scalars

回答： SALINI BALASUBARAMANIUM 2022-3-28

采纳的回答： Cris LaPierre

clear all;

table = readtable ('data_part1.xlsx', 'Range', 'A1:E13')

sigma = table. (3) (1:12);

energy = table. (4) (1:12);

C12 = 4 * energy .* sigma.^12;

C6 = 4 * energy .* sigma.^6;

r = linspace (sigma * 0.95, sigma * 2.5, 12)

data has been imported from an excel spreadsheet hence the references, unsure of how to get rid of this error message on the last line of code? (0.95 and 2.5 are my min and max respectively)

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Answer 1

Cris LaPierre 2020-12-8

1
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/687794-error-using-linspace-input-must-be-scalars#answer_569649

在 MATLAB Online 中打开

You define sigma as a vector (12 numbers). In linspace, your input is sigma multiplied by 0.95 or 2.5. This only scales the values in your vector. The inputs are still vectors. However, they must be scalars (one number).

% Valid syntax
linspace(0,5,10)
ans = 1×10
         0    0.5556    1.1111    1.6667    2.2222    2.7778    3.3333    3.8889    4.4444    5.0000
●
% Incorrect syntax
linspace([0:5],[20:25],12)
Error using linspace (line 22)
Inputs must be scalars.