plot3 not functioning

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Hello ! I have a data on the number of aircraft and delay duration in each hour in a month of January. In order to see the relationship between the number of aircraft and delay duration in each hour, I want to create a 3D plot but after writing the command, the Matlab just plot it in 2D only. Can anyone help me? Thanks in advance.

The command are as below;

    Y = readtable('WMKJDelayTot.xlsx')
    Day = Y.Day;
    Hour = Y.Time;
    Delay = Y.Delay
    NumAircraft = Y.NumAircraft;
    DataTableWMKJ = table(Day,Hour,NumAircraft,Delay,More_Than_10_Hour,More_Than_5_Hour,More_Than_1_Hour,Below_60mins,Below_30mins,Below_15mins,OnTime);
    figure
    v = DataTableWMKJ.Day;
    d = DataTableWMKJ.Hour;
    r = DataTableWMKJ.NumAircraft;
    hold on
    plot3(v,d,r)
    hold off