Why do I get this error while plotting this?

Hello everyone,

I would like to plot the first plot you can see here with the "%other plots" that you see in the code, but I got an error.

Can anyone help me please?

Thank you.

load('giulia_TT');
GIULIA_YEARLY_N=retime(giulia_TT,'yearly','mean');
N=GIULIA_YEARLY_N.Var5*3.5

N = 23×1

NaN 57.2138 97.4158 147.7474 171.8935 146.9554 203.3139 238.9639 266.8034 344.4977

LD = load('giulia_TT.mat');
giulia_TT = LD.giulia_TT;
GIULIA_YEARLY_N = retime(giulia_TT,'yearly', @(x)mean(x,'omitnan'));        % Yearly Average
N=GIULIA_YEARLY_N.Var5*3.5;
SelIdx = year(GIULIA_YEARLY_N.Time) >= 1998;                                % Logical Mask Vectror
N_Sel = N(SelIdx);
N_Sel_Dif = -diff(N_Sel);
Years = 1998+(1:numel(N_Sel_Dif));

figure
plot(Years, N_Sel_Dif)
grid
xlim([min(Years) max(Years)])
xlabel('Years')
ylabel('Yearly N-Differences')
set(gca, 'XTick',Years)

plot(Years, N_Sel_Dif,'g-^' ,'MarkerEdgeColor','k','MarkerFaceColor','g')
hold on 
set(gca, 'ytick', -200:25:400);

%OTHER PLOTS
load('PALINE_GIULIA_DELTA');
errorbar(T.Year(:,1),T.Var4(:,1),T.Var3(:,1),'.r','MarkerSize',6)

Error using errorbar (line 185)
Data inputs must match the axis configuration. A numeric axis must have numeric data inputs or data inputs which can be converted to double.

hold on 
% plot(T.Year(:,1),[NEW(:,1), T.Var4(:,1)]);
hold on
xlabel('Time');
ylabel('Height(mm)');
title('Giulia AWS and Stakes')



%error bar with different colors 
errorbar(T.Year(1:3696,1),T.Var4(1:3696,1),T.Var3(1:3696,1),'.r','MarkerSize',6,'DisplayName','Stakes'); hold on
hold on
errorbar(T.Year(4406:4771,1),T.Var4(4406:4771,1),T.Var3(4406:4771,1),'.b','MarkerSize',6,'DisplayName','Stakes');
hold on
errorbar(T.Year(4772:4880,1),T.Var4(4772:4880,1),T.Var3(4772:4880,1),'.r','MarkerSize',6);
hold on
errorbar(T.Year(4881:7722,1),T.Var4(4881:7722,1),T.Var3(4881:7722,1),'.b','MarkerSize',6);
hold on 
%plot(T.Year(:,1),[NEW, T.Var4(:,1)],'g');

xlabel('Time');

ylabel('Height(mm)');
title('Giulia');

load('DATI_MAR_ANNUALI'); 
load('DATA_ECM');

plot(datetime(DATIMARannuali.Year(20:end,1),1,1), DATIMARannuali.SMB_mp_mm(20:end,1),'--co', 'MarkerEdgeColor','k','MarkerFaceColor','c', 'DisplayName','MAR');
hold off       
hold on
plot(datetime(DATIECMWFannuali.Year,1,1), DATIECMWFannuali.SMB_mp_mm,'m-*', 'DisplayName','ECMWF');
legend('Location','best')
hold on

Answer 1

[Walter Roberson]

errorbar() does support datetime inputs

https://www.mathworks.com/help/matlab/ref/errorbar.html#bvc1i62-1-y

The problem is that you are plotting year first, and the year you plot is pure numeric, 1998+something. Once you have plotted numeric in an axes, you cannot plot datetime or categorical in the same axes.

The workaround is to turn the year into datetime objects,

Years = datetime(Years, 1, 1, 'Format', 'yyyy')

[Pul]

Thank you.

I don't get how I could change it.

[Walter Roberson]

load('giulia_TT');
GIULIA_YEARLY_N=retime(giulia_TT,'yearly','mean');
N=GIULIA_YEARLY_N.Var5*3.5
LD = load('giulia_TT.mat');
giulia_TT = LD.giulia_TT;
GIULIA_YEARLY_N = retime(giulia_TT,'yearly', @(x)mean(x,'omitnan'));        % Yearly Average
N=GIULIA_YEARLY_N.Var5*3.5;
SelIdx = year(GIULIA_YEARLY_N.Time) >= 1998;                                % Logical Mask Vectror
N_Sel = N(SelIdx);
N_Sel_Dif = -diff(N_Sel);
Years = 1998+(1:numel(N_Sel_Dif));
Years = datetime(Years, 1, 1, 'Format', 'yyyy')

figure
plot(Years, N_Sel_Dif)
grid
xlim([min(Years) max(Years)])
xlabel('Years')
ylabel('Yearly N-Differences')
set(gca, 'XTick',Years)

plot(Years, N_Sel_Dif,'g-^' ,'MarkerEdgeColor','k','MarkerFaceColor','g')
hold on 
set(gca, 'ytick', -200:25:400);


%OTHER PLOTS
load('PALINE_GIULIA_DELTA');
TYear = datetime(T.Year, 1, 1, 'Format', 'yyyy');
errorbar(Tyear,T.Var4(:,1),T.Var3(:,1),'.r','MarkerSize',6)
hold on 
% plot(T.Year(:,1),[NEW(:,1), T.Var4(:,1)]);
hold on
xlabel('Time');
ylabel('Height(mm)');
title('Giulia AWS and Stakes')



%error bar with different colors 
errorbar(TYear(1:3696,1),T.Var4(1:3696,1),T.Var3(1:3696,1),'.r','MarkerSize',6,'DisplayName','Stakes'); hold on
hold on
errorbar(TYear(4406:4771,1),T.Var4(4406:4771,1),T.Var3(4406:4771,1),'.b','MarkerSize',6,'DisplayName','Stakes');
hold on
errorbar(TYear(4772:4880,1),T.Var4(4772:4880,1),T.Var3(4772:4880,1),'.r','MarkerSize',6);
hold on
errorbar(TYear(4881:7722,1),T.Var4(4881:7722,1),T.Var3(4881:7722,1),'.b','MarkerSize',6);
hold on 
%plot(T.Year(:,1),[NEW, T.Var4(:,1)],'g');

xlabel('Time')
ylabel('Height(mm)');
title('Giulia');

load('DATI_MAR_ANNUALI'); 
load('DATA_ECM');

DYMAR = datetime(DATIMARannuali.Year,1,1)
plot(DYMAR(20:end), DATIMARannuali.SMB_mp_mm(20:end,1),'--co', 'MarkerEdgeColor','k','MarkerFaceColor','c', 'DisplayName','MAR');
hold off       
hold on
DYCMWF = datetime(DATIECMWFannuali.Year,1,1);
plot(DYCMWF, DATIECMWFannuali.SMB_mp_mm,'m-*', 'DisplayName','ECMWF');
legend('Location','best')
hold on

[Pul]

Thanks for your help.

But here

"TYear = datetime(T.Year, 1, 1, 'Format', 'yyyy');",

I got this error:"Invalid parameter name. Parameter name must be a nonempty string or character vector."

[DGM]

Oh. That must be a recent change, since it doesn't seem to in R2019b.

EDIT: I guess that's new in R2021a

[Walter Roberson]

TYear = T.Year; TYear.Format = 'yyyy';
errorbar(TYear, T.Var4(:,1), T.Var3(:,1), '.r', 'MarkerSize', 6)

[Pul]

@Walter Roberson Thank you, but I'm always having the same error:

errorbar(TYear(4881:7722,1),T.Var4(4881:7722,1),T.Var3(4881:7722,1),'.b','MarkerSize',6);

"Data inputs must match the axis configuration. A numeric axis must have numeric data inputs or data inputs which can be converted to double."

[Walter Roberson]

I do not encounter any problem.

load('giulia_TT');
LD = load('giulia_TT.mat');
giulia_TT = LD.giulia_TT;
GIULIA_YEARLY_N = retime(giulia_TT,'yearly', @(x)mean(x,1,'omitnan'));        % Yearly Average
N=GIULIA_YEARLY_N.Var5*3.5;
SelIdx = year(GIULIA_YEARLY_N.Time) >= 1998;                                % Logical Mask Vectror
N_Sel = N(SelIdx);
N_Sel_Dif = -diff(N_Sel);
Years = 1998+(1:numel(N_Sel_Dif));
Years = datetime(Years, 1, 1, 'Format', 'yyyy');

figure
plot(Years, N_Sel_Dif)
grid
xlim([min(Years) max(Years)])
xlabel('Years')
ylabel('Yearly N-Differences')
set(gca, 'XTick',Years)

plot(Years, N_Sel_Dif,'g-^' ,'MarkerEdgeColor','k','MarkerFaceColor','g')
hold on 
set(gca, 'ytick', -200:25:400);


%OTHER PLOTS
load('PALINE_GIULIA_DELTA');
TYear = T.Year; TYear.Format = 'yyyy';
errorbar(TYear, T.Var4(:,1), T.Var3(:,1), '.r', 'MarkerSize', 6)
hold on 
% plot(T.Year(:,1),[NEW(:,1), T.Var4(:,1)]);
hold on
xlabel('Time');
ylabel('Height(mm)');
title('Giulia AWS and Stakes')



%error bar with different colors 
errorbar(TYear(1:3696,1),T.Var4(1:3696,1),T.Var3(1:3696,1),'.r','MarkerSize',6,'DisplayName','Stakes'); hold on
hold on
errorbar(TYear(4406:4771,1),T.Var4(4406:4771,1),T.Var3(4406:4771,1),'.b','MarkerSize',6,'DisplayName','Stakes');
hold on
errorbar(TYear(4772:4880,1),T.Var4(4772:4880,1),T.Var3(4772:4880,1),'.r','MarkerSize',6);
hold on
errorbar(TYear(4881:7722,1),T.Var4(4881:7722,1),T.Var3(4881:7722,1),'.b','MarkerSize',6);
hold on 
%plot(T.Year(:,1),[NEW, T.Var4(:,1)],'g');

xlabel('Time')
ylabel('Height(mm)');
title('Giulia');

load('DATI_MAR_ANNUALI'); 
load('DATA_ECM');

DYMAR = datetime(DATIMARannuali.Year,1,1);
plot(DYMAR(20:end), DATIMARannuali.SMB_mp_mm(20:end,1),'--co', 'MarkerEdgeColor','k','MarkerFaceColor','c', 'DisplayName','MAR');
hold off       
hold on
DYCMWF = datetime(DATIECMWFannuali.Year,1,1);
plot(DYCMWF, DATIECMWFannuali.SMB_mp_mm,'m-*', 'DisplayName','ECMWF');
legend('Location','best')
hold on

[Pul]

Now it works, thank you.

Answer 2

[DGM]

errorbar() doesn't support datetime inputs. You'll end up needing to avoid that, which might complicate things a bit:

https://www.mathworks.com/matlabcentral/answers/477180-making-errorbar-work-with-datetime

[Pul]

but it's weird, because on my matlab I can plot this plots separately, but not all together.