Adjusting the datetick issue.

Question

peter huang 2023-7-6

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1992553-adjusting-the-datetick-issue

评论： Peter Perkins 2023-7-17

x is a sequence from 2005 to 2023 with a step of every two years. y represents my calculated results, and I'm using sine values as a substitute. I want to use the range from 2003 to 2023 for the x-axis. So, I used the xlim function to adjust the x-axis. However, I want both the start and end of the x-axis to show 2003 and 2023. How can I achieve this?

Below is my sample code:

clear all ; clc ;clf

set(gcf,'color','w')

load m_time_1516.mat

%%

x = 1 : 9

y = sin(x)

m_time_1516(1) =[]

plot(m_time_1516 ,y)

datetick('x','yyyy' )

s_time = datenum('01-01-2003')

e_time = datenum('01-01-2023')

xlim([s_time ,e_time]);

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Stephen23 2023-7-6

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1992553-adjusting-the-datetick-issue#answer_1268288

编辑：Stephen23 2023-7-6

在 MATLAB Online 中打开

m_time_1516.mat

Do not use deprecated DATENUM or serial date numbers or the like.

Use DATETIME (and set the format if required):

S = load('m_time_1516.mat')

S = struct with fields:

m_time_1516: [0 7.3268e+05 7.3341e+05 7.3414e+05 7.3487e+05 7.3560e+05 7.3633e+05 7.3706e+05 7.3779e+05 7.3852e+05] s_time_1516: [0 732313 733043 733774 734504 735235 735965 736696 737426 738157]

X = datetime(S.m_time_1516(2:end), 'ConvertFrom','datenum');

Y = sin(1:numel(X));

plot(X,Y)

xlim(datetime([2003,2023],1,1))

You might find this useful too:

https://www.mathworks.com/help/matlab/ref/xtickformat.html

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Peter Perkins 2023-7-17

Stephen and Kevin have the right advice: don't use datenums (or these days, even datetick). Convert to datetime at the earliest point in your code.

请先登录，再进行评论。

Answer 2

Atithi 2023-7-6

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1992553-adjusting-the-datetick-issue#answer_1268273

在 MATLAB Online 中打开

By adding the xticks and xticklabels functions, you can set explicit tick locations and labels for the x-axis. In this case, we set the tick locations to [s_time, e_time] and the tick labels to {'2003', '2023'}. This ensures that both the start and end of the x-axis display the desired years.

clear all; clc; clf
set(gcf, 'color', 'w')
load m_time_1516.mat
x = 1:9;
y = sin(x);
m_time_1516(1) = [];
plot(m_time_1516, y)
datetick('x', 'yyyy')
s_time = datenum('01-01-2003');
e_time = datenum('01-01-2023');
xlim([s_time, e_time]);
xticks([s_time, e_time]);  % Set explicit tick locations
xticklabels({'2003', '2023'});  % Set tick labels