Outputting as Column vectors as too many columns

Question

Chaz 2015-11-5

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/252940-outputting-as-column-vectors-as-too-many-columns

编辑： Walter Roberson 2015-11-5

I have been receiving 12 columns instead of 4 when I run it. I have tried to run a while loop to only run one value from the column at a time but I have been getting errors. I am not sure how to call specific row and column placements from the vectors. This is my crude attempt at it. I really appreciate your help

R1=119.2; %%Resisters
R4=119.1; %%Resisters
Rpot=120.1; %%Potentiometer
Ro=120.2; %%Strain Gage Resistance Unloaded
Ri=909.0909;
Rf=1000000;
Vs=5; %%Voltage
GF=2.14; %%Gage Factor
E=10.4; %%Modulus of Elasticity Aluminium
Vo1=[0; 1.64; 1.565; 1.606; 1.615; 1.593; 1.648; 1.465; 1.595; 1.545; 1.63; 0;] %%Output voltage Item 1
Vo2=[0; 1.716; 1.56; 1.61; 1.661; 1.682; 1.705; 1.59; 1.64; 1.687; 1.661; 0;] %%Output voltage Item 2
Vo3=[1.667; 1.69; 1.68; 1.705; 1.711; 0; 1.698; 1.62; 1.626; 1.65; 1.687; 0;] %%Output voltage Item 3
Vo4=[1.75; 1.713; 1.635; 1.715; 1.766; 0; 0; 0; 0; 0; 0; 0;] %%Output voltage Item 4
Vbridge=[Vo1 Vo2 Vo3 Vo4]/((1+Rf/Ri)) %%Bridge Voltage Output
y=1
x=1
while x<=12
      while y<=12
          Rg(x,y)=-((Rpot*(Vbridge(x,y)+Vs)+R1*Vbridge(x,y))/(R4*Vbridge(x,y)+R1*(Vbridge(x,y)-Vs)))
          y=y+1
      end
      x=1
      x=x+1
  end

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Answer 1

Walter Roberson 2015-11-5

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链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/252940-outputting-as-column-vectors-as-too-many-columns#answer_198530

I copied and pasted your exact code, and received only one value for Vbridge and only one value for Rg.

I notice that you are not using Vol1, Vol2, Vol3, or Vol4 in your calculations. I also notice that those are vectors of 12 items. You were probably running some calculation involving them.

I suspect that you need to read http://www.mathworks.com/help/matlab/ref/mrdivide.html and http://www.mathworks.com/help/matlab/ref/rdivide.html

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Chaz 2015-11-5

编辑：Walter Roberson 2015-11-5

在 MATLAB Online 中打开

I have been receiving 12 columns instead of 4 when I run it. I have tried to run a while loop to only run one value from the column at a time but I have been getting errors. I am not sure how to call specific row and column placements from the vectors. This is my crude attempt at it. I really appreciate your help

R1=119.2;           %%Resisters
R4=119.1;           %%Resisters
Rpot=120.1;         %%Potentiometer
Ro=120.2;           %%Strain Gage Resistance Unloaded
Ri=909.0909;        
Rf=1000000;
Vs=5;               %%Voltage
GF=2.14;            %%Gage Factor
E=10.4;             %%Modulus of Elasticity Aluminium
Vo1=[0; 1.64; 1.565; 1.606; 1.615; 1.593; 1.648; 1.465; 1.595; 1.545; 1.63; 0;] %%Output voltage Item 1
Vo2=[0; 1.716; 1.56; 1.61; 1.661; 1.682; 1.705; 1.59; 1.64; 1.687; 1.661; 0;]   %%Output voltage Item 2
Vo3=[1.667; 1.69; 1.68; 1.705; 1.711; 0; 1.698; 1.62; 1.626; 1.65; 1.687; 0;]   %%Output voltage Item 3
Vo4=[1.75; 1.713; 1.635; 1.715; 1.766; 0; 0; 0; 0; 0; 0; 0;]                                      %%Output voltage Item 4
Vbridge=[Vo1 Vo2 Vo3 Vo4]/((1+Rf/Ri))                %%Bridge Voltage Output
y=1
x=1
while x<=12
      while y<=12
          Rg(x,y)=-((Rpot*(Vbridge(x,y)+Vs)+R1*Vbridge(x,y))/(R4*Vbridge(x,y)+R1*(Vbridge(x,y)-Vs)))
          y=y+1
      end
      x=1
      x=x+1
end