Combining Matrices from a loop into a single large Matrix

2015 5 22
2 个回答
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更新时间：2019 6 19
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I'm trying to find a shorter way to combine an increasing array of values that has to be inputted into several equations.
The only way I could think of based on my knowledge was a for loop like for example; This:
V9_eff2 = V9Split{2}+(((P9-Po).*A92)./mdot_core);
V9_eff3 = V9Split{3}+(((P9-Po).*A93)./mdot_core);
V9_eff4 = V9Split{4}+(((P9-Po).*A94)./mdot_core);
V9_eff5 = V9Split{5}+(((P9-Po).*A95)./mdot_core);
V9_eff6 = V9Split{6}+(((P9-Po).*A96)./mdot_core);
V9_eff7 = V9Split{7}+(((P9-Po).*A97)./mdot_core);
V9_eff8 = V9Split{8}+(((P9-Po).*A98)./mdot_core);
V9_eff9 = V9Split{9}+(((P9-Po).*A99)./mdot_core);
V9_eff10 = V9Split{10}+(((P9-Po).*A910)./mdot_core);
V9_eff11 = V9Split{11}+(((P9-Po).*A911)./mdot_core);
V9_eff12 = V9Split{12}+(((P9-Po).*A912)./mdot_core);
V9_eff13 = V9Split{13}+(((P9-Po).*A913)./mdot_core);
V9_eff14 = V9Split{14}+(((P9-Po).*A914)./mdot_core);
V9_eff15 = V9Split{15}+(((P9-Po).*A915)./mdot_core);
V9_eff16 = V9Split{16}+(((P9-Po).*A916)./mdot_core);
V9_eff17 = V9Split{17}+(((P9-Po).*A917)./mdot_core);
V9_eff18 = V9Split{18}+(((P9-Po).*A918)./mdot_core);
V9_eff19 = V9Split{19}+(((P9-Po).*A919)./mdot_core);
V9_eff20 = V9Split{20}+(((P9-Po).*A920)./mdot_core);
V9_effX = [V9_eff1; V9_eff2; V9_eff3; V9_eff4; V9_eff5; V9_eff6; V9_eff7; V9_eff8; V9_eff9; V9_eff10; V9_eff11; V9_eff12; V9_eff13; V9_eff14; V9_eff15; V9_eff16; V9_eff17; V9_eff18; V9_eff19; V9_eff20]
To be replaced by a loop however I would like to combine the loop iteration matrices into one large one, is there a way to do this in MATLAB?

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James Tursa
James Tursa 2015-5-22
编辑：James Tursa 2015-5-22

2 个投票

Experienced MATLAB users cringe when we see code that has a boat load of variable names ending in numbers, like A92, A93, etc. The first thing we would advise is to rewrite your code to use cell arrays or struct arrays to contain your data and abandon this cumbersome variable naming approach you have taken. As you can see, it is fast becoming difficult to write code using all of those variable names. In order to write loops one ends up using the eval( ) function with dynamically created variable names. Very messy code that is hard to read and maintain. E.g., read this:
http://www.mathworks.com/matlabcentral/answers/143-how-do-i-make-a-series-of-variables-a1-a2-a3-a10

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