s_iplot.m

地震、测井方面matlab代码,解释的比较详细

    error(' Abnormal termination')
  end
end

%    Trace-to-trace separation
if ntr > 1
   dx=(max(xi)-min(xi))/(ntr-1);
else
   dx=1;
end

%     Scale data
if ischar(param.scale)
   if strcmpi(param.scale,'yes')
      scale=(dx*param.deflection)./(trace_max+eps)';
      yi=yi*spdiags(scale,0,ntr,ntr);
   else
      scale=dx*param.deflection/(max(trace_max)+eps);
      yi=yi*scale;
   end
else
   scale=param.scale;
   if length(scale) == 1
      yi=yi*scale;
   elseif length(scale) == ntr
      yi=yi*spdiags(scale(:),0,ntr,ntr);
   else
      error(' Scale factor must be scalar or vector of length equal to the number of traces')
   end
end

if nargout == 1
   aux.scale=scale;
end

%       Create axis
axis([min(xi)-dx*max([param.deflection,1]),max(xi)+dx*max([param.deflection,1]),seismic.first,seismic.last]);
hold on
ha=get(gcf,'CurrentAxes');
set(ha,'ydir','reverse')
set(ha,'XAxisLocation','top');

%    Handle reversal of plot direction
if strcmpi(param.direction,'r2l')
   set(ha,'XDir','reverse')
%   dx=-dx;
   yi=-yi;
   temp=param.trough_fill;
   param.trough_fill=param.peak_fill;
   param.peak_fill=temp;
elseif strcmpi(param.direction,'l2r')
   set(ha,'XDir','normal')

else
   error(['Keyword for plot direction is wrong (',param.direction,')'])
end

if strcmpi(param.figure_only,'yes')
   return
end

%    Check if there are NaNs in the seismic data
if isfield(seismic,'null')
   isnull=1;
else
   isnull=0;
end

%    Plot data
if strcmpi(param.quality,'draft')
   ue4i_seismic_plot(times,yi,xi,isnull,param);
else
   ue4i_seismic_plot_ps(times,yi,xi,isnull,param)
end
box

if strcmpi(param.tracking,'yes')
%	Add cursor tracking
   [dummy,xinfo]=s_gh(seismic,param.annotation);
   y=linspace(seismic.first,seismic.last,nsamp);
   yinfo=info4time(seismic);
   initiate_3d_tracking(seismic.traces,xi,y,xinfo,yinfo,{'amplitude','','Amplitude'},logical(1),ha)
end


%	Add annotation of horizontal axis
if ~annotlog
   v=axis;
   xil=xi(indices);
   annol=annotation(indices);
   add_xaxis([xil',annol'],'',{'location','top'});
end

%	Add label of horizontal axis
%       (if 5 or more traces or annotation other than trace number)
if ~strcmpi(param.annotation,'trace_no') | ntr > 4
    xtext=s_gd(seismic,param.annotation);
    hunits=s_gu(seismic,param.annotation);

    if ~isempty(xtext) & ~strcmpi(xtext,'not available')
       if ~isempty(hunits) & ~strcmpi(hunits,'n/a')
          xtext=[xtext,' (',hunits,')'];
       end
       hxlabel=xlabel(xtext);
       v=get(hxlabel,'Position'); % Preserve position of x-axis label
    else
       hxlabel=xlabel('');
    end
else
    set(gca,'XTickLabel',[])
end

if uniform & (~strcmpi(param.annotation,'trace_no') | ntr > 4)
%  set(gca,'XTickLabel',[]);	 % Delete original annotation but
                                 % keep x-axis label at original position
   try                        
      set(hxlabel,'Position',v);    
   catch
   end
end


grid on; 
set(ha,'gridlinestyle','-','box','on','xgrid','off')

%  Title
if ~isempty(param.title)
   if iscell(param.title)		% Handle multi-line titles
      mytitle(param.title{1})
   else
      mytitle(param.title)
   end
end

if strcmpi(param.figure,'new')
   if strcmpi(param.orient,'landscape')
      time_stamp
   else
      time_stamp_p
   end
end
zoom on
hold off

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function ue4i_seismic_plot(times,traces,location,isnull,param)
% Function plot seismic traces at horizontal locations controlled by location
%
% INPUT
% times   vector of y-coordinates for the trace samples
% traces  matrix of trace samples
% location  vector of x-coordinates of the traces
% isnull  logical variable; true if the traces have null values.
% param   structure with input parameters

dt=times(2)-times(1);
times_orig=times;
ntr=size(traces,2);
hpeak=zeros(1,ntr);
htrough=zeros(1,ntr);
hwiggle=zeros(1,ntr);

for ii=1:ntr
   skip=0;        
   if isnull
      idx=find(~isnan(traces(:,ii)));
      if isempty(idx)
         skip=1;
      else
         y=traces(idx,ii);
         times=times_orig(idx);
      end
   else
      y=traces(:,ii);
   end

              if ~skip
   chg=find(y(1:end-1).*y(2:end) < 0);
   x_zero=abs(y(chg)./(y(chg+1)-y(chg)))*dt+times(chg);
   [x_data,idx]=sort([times(1);times;x_zero;times(end)]);
   y_data=[0;y;zeros(length(x_zero),1);0];
   y_data=y_data(idx);

   pos=find(y_data >= 0);
   hpeak(ii)=fill(y_data(pos)+location(ii),x_data(pos),'w'); 

   neg=find(y_data <= 0);
   htrough(ii)=fill(y_data(neg)+location(ii),x_data(neg),'w');

   if ~isempty(param.trough_fill) | ~isempty(param.peak_fill)
      plot([location(ii),location(ii)],[times(2),times(end)],'w-')
   end
      hwiggle(ii)=line(y_data(2:end-1)+location(ii),x_data(2:end-1),'Color',param.wiggle, ...
      'EraseMode','none','LineWidth',param.wiggle_width);
              end
end
set(htrough,'EdgeColor','none','FaceColor',param.trough_fill)
set(hpeak,'EdgeColor','none','FaceColor',param.peak_fill)

bool=ishandle(hpeak);
hpeak=hpeak(bool);
htrough=htrough(bool);
hwiggle=hwiggle(bool);
set(hpeak,'FaceColor',param.peak_fill)
set(htrough,'FaceColor',param.trough_fill)
handles.hpeak=hpeak;
handles.htrough=htrough;
handles.hwiggle=hwiggle;

haxes=gca;
userdata=get(haxes,'UserData');
userdata.trace_handles=handles;
set(haxes,'UserData',userdata)


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function ue4i_seismic_plot_ps(times,traces,location,isnull,param)
% Function plot seismic traces at horizontal locations controlled by location
% Avoids vertical lines from top to bottom on some PS interpreters
% Much slower than ue_seismic_plot

dt=times(2)-times(1);
times_orig=times;

ipeak=0;
itrough=0;
[nsamp,ntr]=size(traces);
hpeak=zeros(1,nsamp*ntr);
htrough=zeros(1,nsamp*ntr);
hwiggle=zeros(1,ntr);

for ii=1:ntr
   skip=0;        
   if isnull
      idx=find(~isnan(traces(:,ii)));
      if isempty(idx)
         skip=1;
      else
         y=traces(idx,ii);
         times=times_orig(idx);
      end
   else
      y=traces(:,ii);
   end
              if ~skip
   chg=find(y(1:end-1).*y(2:end) < 0);
   x_zero=abs(y(chg)./(y(chg+1)-y(chg))).*dt+times(chg);
   [x_data,idx]=sort([times(1);times;x_zero;times(end)]);
   y_data=[0;y;zeros(length(x_zero),1);0];
   y_data=y_data(idx);
   pos=find(y_data >= 0);  
   % y_pos=y_data(pos); pos=find(y_data >= 0);
   ind1=find(diff(pos) > 1); 
   ind=[pos(1),reshape([pos(ind1)';pos(ind1+1)'],1,[]),pos(end)];
   % x_pos=x_data(pos);
   for kk=1:2:length(ind)-1;
      index=ind(kk):ind(kk+1);
      ipeak=ipeak+1;
      hpeak(ipeak)=fill(y_data(index)+location(ii),x_data(index),'w', ...
             'erasemode','none','EdgeColor','none'); 
   end
   neg=find(y_data <= 0);
   ind=find(diff(neg) > 1); 
   ind=[neg(1),reshape([neg(ind)';neg(ind+1)'],1,[]),neg(end)];
   % y_neg=y_data(neg);
   % x_neg=x_data(neg);
   for kk=1:2:length(ind)-1
       itrough=itrough+1;
       index=ind(kk):ind(kk+1);
       htrough(itrough)=fill(y_data(index)+location(ii),x_data(index),'w', ...
             'erasemode','none','EdgeColor','none'); 
   end

   hwiggle(ii)=line(y_data(2:end-1)+location(ii),x_data(2:end-1),'Color',param.wiggle, ...
        'erasemode','none','LineWidth',param.wiggle_width); 
              end
end

hpeak=hpeak(1:ipeak);
htrough=htrough(1:itrough);
hwiggle=hwiggle(ishandle(hwiggle));

set(hpeak,'FaceColor',param.peak_fill)
set(htrough,'FaceColor',param.trough_fill)

handles.hpeak=hpeak;
handles.htrough=htrough;
handles.hwiggle=hwiggle;

haxes=gca;
userdata=get(haxes,'UserData');
userdata.trace_handles=handles;
set(haxes,'UserData',userdata)