I'm trying to graph data from an html file and I'm unsure how to load and graph it.

this is the data https://coyote.eece.maine.edu/ece101/hw/umhab-137-iridium.html

im trying to graph time on the x axis and rise rate on the y

meaning (current alt-start alt)/(current time-start time)

Answer 1

[Voss]

url = "https://coyote.eece.maine.edu/ece101/hw/umhab-137-iridium.html";
T = readtable(url);
head(T)

       IMEI       Time-UTC       Date        Latitude    Longitude     Alt-m     Alt-ft     V_Vel-m/s    V_Vel-ft/s
    __________    ________    ___________    ________    _________    _______    _______    _________    __________

    3.0053e+14    17:36:23    14-Oct-2023     40.734      -116.81     "2,037"    "6,683"        0            0     
    3.0053e+14    17:36:23    14-Oct-2023     40.734      -116.81     "2,037"    "6,683"        0            0     
    3.0053e+14    17:36:13    14-Oct-2023     40.734      -116.81     "2,037"    "6,683"        0            0     
    3.0053e+14    17:36:13    14-Oct-2023     40.734      -116.81     "2,037"    "6,683"        0            0     
    3.0053e+14    17:36:05    14-Oct-2023     40.734      -116.81     "2,038"    "6,685"        0            0     
    3.0053e+14    17:36:05    14-Oct-2023     40.734      -116.81     "2,038"    "6,685"        0            0     
    3.0053e+14    17:35:57    14-Oct-2023     40.734      -116.81     "2,038"    "6,685"        0            0     
    3.0053e+14    17:35:57    14-Oct-2023     40.734      -116.81     "2,038"    "6,685"        0            0     

tail(T)

       IMEI       Time-UTC       Date        Latitude    Longitude     Alt-m     Alt-ft     V_Vel-m/s    V_Vel-ft/s
    __________    ________    ___________    ________    _________    _______    _______    _________    __________

    3.0053e+14    05:34:58    14-Oct-2023     40.969      -117.74     "1,307"    "4,289"        0             1    
    3.0053e+14    05:34:58    14-Oct-2023     40.969      -117.74     "1,307"    "4,289"        0             1    
    3.0053e+14    05:34:27    14-Oct-2023     40.969      -117.74     "1,301"    "4,267"        0            -2    
    3.0053e+14    05:34:27    14-Oct-2023     40.969      -117.74     "1,301"    "4,267"        0            -2    
    3.0053e+14    05:32:11    14-Oct-2023     40.969      -117.74     "1,308"    "4,290"        0             0    
    3.0053e+14    05:32:11    14-Oct-2023     40.969      -117.74     "1,308"    "4,290"        0             0    
    3.0053e+14    05:31:46    14-Oct-2023     40.969      -117.74     "1,312"    "4,304"        0             0    
    3.0053e+14    05:31:46    14-Oct-2023     40.969      -117.74     "1,312"    "4,304"        0             0    

alt = str2double(T.("Alt-m"));
time = T.("Time-UTC");

rise_rate = (alt-alt(end))./seconds(time-time(end)); % m/s

plot(time,rise_rate)