Undefined function or variable.

clear; clc;

m_proj('Miller','lat',[0 14],'lon',[95 126]);

% Generate a smaller coastline for faster plot
m_gshhs_f('save','RTKNET');

dir = 'C:\Users\ACER\Documents\1-DOKUMEN\5-DOKUMEN MAT NIZAM\PSM\all\5-RESEARCH INFORMATION\RADS\m_map';

file = 'Wave_climatology(SW).asc';
%out = 'M2_aaaa.xlsx';
name = 'Significant Wave Height Climatology over Malaysian Seas during Southwest Monsoon from 1993 to 2016 (May-August) ';

cd(dir)
Data = textread(file);
    
lat = Data(:,1);
lon = Data(:,2);
geoid = Data(:,3); % unit 3 (m) 5 (cm)
     
    % Specifying map projection
    figure;
    m_proj('Miller','lat',[0 14],'lon',[95 126]);

    % Contour & colour settings
    dx =95:0.25:126;   % set the min,max latitude and interval
    dy = 0:0.25:14+1; % set the min,max longitude and interval
    [Xi,Yi] = meshgrid(dx,dy);
    [Zi] = surfergriddata(lon,lat,geoid,Xi,Yi);
    
%     datata = [Zi];
%     xlswrite(out, datata);
%     %xlswrite(latname, Yi);
%     %xlswrite(longname, Xi);
     m_pcolor(Xi,Yi,Zi)
     shading interp;
     colormap jet;

%     Coastline & grid
    m_gshhs_f('patch',[1 1 1]);
    m_gshhs_f('color','k');
    m_usercoast('RTKNET','color','k');
    m_grid('linestyle','none','box','fancy','tickdir','in');

    % Labels & colorbar
    title(name,'FontWeight','bold','FontSize',12);
    xlabel('Longitude','FontWeight','bold','FontSize',12);
    ylabel('Latitude','FontWeight','bold','FontSize',12);
    
%[X,Y]=m_xy2ll(lon,lat);
%m_line(lon,lat,'linewi',4,'color','r');
%m_line(amp1,lon1,'linewi',4,'color','b');

%     caxis([28.28,30.97])
%cb = colorbar('h');
%set(get(cb,'xlabel'),'String','Amplitude (m)','FontWeight','bold');
set(get(colorbar,'ylabel'),'String','Significant Wave Height (m)','FontWeight','bold')

Error:

Undefined function or variable 'Zi'.

Error in mapping1 (line 46)

[Zi] = surfergriddata(lon,lat,geoid,Xi,Yi);

[Torsten]

"surfergriddata" has 6 input arguments, not 5.

Answer 1

[KALYAN ACHARJYA]

If you are using this file exchange custom function, you have to pass SIX inputs to the function, not FIVE