MATLAB: Reshape a column vector in a row-wise direction

reshape row direction reshape

if I have column vector A= 1;2;3;4;5;6;7;8;9;10 how do I get matlab to reshape it in the row wise direction so it becomes

A= 1 2 3 4 5
   6 7 8 9 10

as the reshape function seems to take it in column wise direction format?

Best Answer

A= [1;2;3;4;5;6;7;8;9;10 ] ;
B = reshape(A,[],2)'

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MATLAB: Interpolate gridded matrix row-wise

Normally you could achieve this easily by interpolating over rows with a function that does not extrapolate by default. I believe interp1 could do this (?). I used a slighly more messy approach, where I drew a polygon around the area of interest, filled all nans, then removed all points outside of the polygon.

Z = sst_up_574;
X = Y1;
Y = Ydepth;
%Scan rows and find first non-NaN
x = nan(size(X,1))
y = nan(size(Y,1))
for j = 1:size(Z,1)
    [~,c] = find(~isnan(Z(j,:))==true,1,'first');
    if ~isempty(c)
        x(j) = X(j,c);
        y(j) = Y(j,c);
    else
        x(j) = max(X(j,:));
        y(j) = max(Y(j,:));
    end
end
x(isnan(x))=[];
y(isnan(y))=[];
%Build a polygon
x = [x 0];
y = [y min(Y(:))]
%Find points inside of polygon
in = inpolygon(X(:),Y(:),x,y);
%Fill all NaNs
Zq = fillmissing(Z,'linear',2);
%Set values outside of polygon to NaN
Zq(~in) = NaN;
figure(1)
pcolor(X,Y,Zq); shading flat
set(gca,'Ydir','reverse')
set(gca,'xlim',[bin(1) bin(91)],...
    'ylim',[0 500],'fontsize',8,'xminortick','on','yminortick','on')
hold on
hc = colorbar;
rmap=jet(20);
newmap=rmap(2:1:20,:);
colormap(newmap);
caxis([4 23]);
grid on;
box on
set(gca,'Fontweight','bold','Fontsize',16);
set(get(hc,'ylabel'),'string','Water Temperature (^oC)','rotation',270,'verticalalignment','bottom');
ylabel('Depth (m)');
xlabel('Date');
title(['Water Temperature: Upstream SG574'], 'fontweight', 'bold','FontSize',18)

MATLAB: How to make a 3×3 matrix a 9×1 matrix

 reshape(x,9,1)

 x(:) % this creates a column vector out of a matrix

Best Answer

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MATLAB: Interpolate gridded matrix row-wise

MATLAB: How to make a 3×3 matrix a 9×1 matrix

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