MATLAB: How to create matrix with array under certain conditions

matrix array

I have an array:

A=[1.3 1.2 1.3]

How can I get matrix B using A?

B=[1.3 1.3 1.3; 1.3 1.2 1.3; 1.3 1.3 1.3]

Matrix B has the value of A at the central row,column,and diagonal.

Best Answer

B = [ones(1,3)*A(1); A; ones(1,3)*A(1)]

Related Solutions

MATLAB: Area under the curve with conditions

Try this:

t = 1:48;                                                   % Time Vector
load = randi(1000, 1, 48);                                  % Create Data
level_1 = 750;
level_2 = 600;
above_level_1 = load >= level_1;                            % Logical Index Vector

area_1 = trapz(t(above_level_1), load(above_level_1));      % Area Under ‘Level_1’
below_level_2 = load <= level_2;                            % Logical Index Vector
area_2 = trapz(t(below_level_2), load(below_level_2));      % Area Under ‘Level_2’
figure
plot(t, load)
hold on
plot(xlim, [1 1]*level_1)
plot(xlim, [1 1]*level_2)
hold off
grid

MATLAB: How to commit statement only under certain conditions

electric     = true;
photovoltaic = false;
for iMinute = 1:365*24*60
  if temperature(iMinute) < 50
    electric = true;
  elseif temperature(iMinute) > 55
    electric = false;
  end
  photovoltaic = (temperature(iMinute) < 70);
  ...
end

Best Answer

Related Solutions

MATLAB: Area under the curve with conditions

MATLAB: How to commit statement only under certain conditions

Related Question