Axis Ticks using Calendar Year ticks with BC years

Question

Charles Mina 2023-1-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1899305-axis-ticks-using-calendar-year-ticks-with-bc-years

评论： Walter Roberson 2023-1-24

I have some code here used for Grain Size analysis of a core, I wanted to correlate each point with an age, so I created a list with age of each with years and formatted them to use the 'yyyy G' format. however when I try to use the yticks command to create certain tick labels, it says that it cannot use the list since it is not "increasing" due to how the ISO labelling system works for years. is there a way to make this work? Code without and with system is below.

cla reset
plot(GSListNorm,DepthList)
set(gca,'YDir','reverse')
yyaxis left
xline(median(GSListNorm),"--r")
xlabel(["Normalized Grain Size at 90%"])
ylabel(["Depth";"(cm)"])
xlim([-2 5])
ylim([0 110])
yticks(0:10:max(DepthList))
yyaxis right
plot(GSListNorm,YearAge,LineStyle='none')
ylabel(["Age","Calendar Year"])
ytickformat('yyyy G')
saveas(gcf,'GSNoTrend','png')
cla reset

YearTicks = datetime('1950'	'1725'	'1501'	'1277'	'1053'	'0828'	'0604'	'0380'	'0156'	'0069'	'0293')% I know this code isn't right but these are the values of the list
Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

Error in connector.internal.fevalMatlab

Error in connector.internal.fevalJSON
cla reset
plot(GSListNorm,DepthList)
set(gca,'YDir','reverse')
yyaxis left
xline(median(GSListNorm),"--r")
xlabel(["Normalized Grain Size at 90%"])
ylabel(["Depth";"(cm)"])
xlim([-2 5])
ylim([0 110])
yticks(0:10:max(DepthList))
yyaxis right
plot(GSListNorm,YearAge,LineStyle='none')
ylabel(["Age","Calendar Year"])
ytickformat('yyyy G')
yticks(YearTicks)
saveas(gcf,'GSNoTrend','png')
cla reset

Error using yticks

Tick values must be a vector of increasing datetime values.

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

Walter Roberson 2023-1-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1899305-axis-ticks-using-calendar-year-ticks-with-bc-years#answer_1154830

移动：Walter Roberson 2023-1-23

在 MATLAB Online 中打开

YearTicks = datetime({'1950 CE'; '1725 CE'; '1501 CE'; '1277 CE'; '1053 CE'; '0828 CE'; '0604 CE'; '0380 CE'; '0156 CE'; '0069 CE'; '0293 BCE'}, 'Inputformat', 'yyyy G', 'Format', 'yyyy G');

plot(rand(1,length(YearTicks)), YearTicks)

yticks( sort(YearTicks))

2 个评论
显示无隐藏无

Charles Mina 2023-1-24

Thank You! but i would like to ask why the sort is necessary?

Walter Roberson 2023-1-24

在 MATLAB Online 中打开

yticks() requires that the values be given in increasing order, but your input YearTicks are in decreasing order.

You could also have done

yticks( flipud(YearTicks) )

but that is fragile against the possibility that YearTicks is already increasing, or against the possibility that YearTicks is a row vector instead of a column vector.

请先登录，再进行评论。