Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

I have highlighted in bold the line that is coming up with the error message:

function plottransect(1)

% input transno to define which transect is to be plotted

% plot transect for OS105

ctdFiles=dir(['Ctd_Transects_2018' filesep 'CTDdata*']);

gpsFiles=dir(['Ctd_Transects_2018' filesep 'GPSdata*']);

load(['Ctd_Transects_2018' filesep ctdFiles(transno).name])

load(['Ctd_Transects_2018' filesep gpsFiles(transno).name])

ct=CTDdata(:,1);

cT=CTDdata(:,4);

cS=CTDdata(:,8);

gt=GPSdata(:,1);

glon=GPSdata(:,5);

glat=GPSdata(:,6);

gT=interp1(ct,cT,gt);

gS=interp1(ct,cS,gt);

% Temperature subplot

figure(transno)

sp1=subplot(1,2,1);

scatter(glon,glat,20,gt,'filled')

Error: File: plottransect.m Line: 1 Column: 23

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other

syntax error. To construct matrices, use brackets instead of parentheses.

Answer 1

[Steven Lord]

function plottransect(1)

As stated on this documentation page "If your function accepts any inputs, enclose their names in parentheses after the function name."

1 is not a valid variable name. If instead you defined your function like:

function plottransect(in1)

then you could call it like this to make plottransect assign 1 to the variable in1 inside that call.

plottransect(1)

[Mary-Anne Upson]

Thank you for your help!