Having hard time plotting groups

Question

Mary Johnson 2020-10-8

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https://ww2.mathworks.cn/matlabcentral/answers/608536-having-hard-time-plotting-groups

编辑： Mary Johnson 2020-10-10

I have two sets of group(each group 3 column). I have the mean for each column. I wanted to plot both groups on one graph but i am having hard time understanding the best code to use to get the graph. I am really new to Matlab and would appreciate the help.

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Seth Furman 2020-10-8

在 MATLAB Online 中打开

What is your goal? It would be helpful if you could provide a simple example of what your data look like and what you want your graph to look like.

Are you, for example, trying to plot averaged data of each group so that you have 2 lines, one for each group? One simple way to do this is using stackedplot.

>> t = array2table(reshape(1:36,6,6))
t =
  6×6 table
    Var1    Var2    Var3    Var4    Var5    Var6
    ____    ____    ____    ____    ____    ____
     1        7      13      19      25      31 
     2        8      14      20      26      32 
     3        9      15      21      27      33 
     4       10      16      22      28      34 
     5       11      17      23      29      35 
     6       12      18      24      30      36 
>> t.Group1Mean = mean(t{:,1:3},2);
>> t.Group2Mean = mean(t{:,4:6},2)
t =
  6×8 table
    Var1    Var2    Var3    Var4    Var5    Var6    Group1Mean    Group2Mean
    ____    ____    ____    ____    ____    ____    __________    __________
     1        7      13      19      25      31          7            25    
     2        8      14      20      26      32          8            26    
     3        9      15      21      27      33          9            27    
     4       10      16      22      28      34         10            28    
     5       11      17      23      29      35         11            29    
     6       12      18      24      30      36         12            30    
>> stackedplot(t,{["Group1Mean","Group2Mean"]})

Seth Furman 2020-10-9

在 MATLAB Online 中打开

Mary, I'm still a little confused what you mean by "the column rather than the rows".

What data do you want for the x-axis?
What data do you want for the y-axis?
How many plots do you want?
Are you looking to plot the data in your screenshot as-is, or do you want to process it before plotting, for example by averaging Groups A through C?

Do you want two adjacent plots, the first with Groups A through C plotted against row index (3 separate lines with 19 points each) and the second with Groups D through F (3 separate lines with 19 points each).

e.g.

>> t = array2table(reshape(1:36,6,6),'VariableNames',strcat("Group",["A" "B" "C" "D" "E" "F"]))
t =
  6×6 table
    GroupA    GroupB    GroupC    GroupD    GroupE    GroupF
    ______    ______    ______    ______    ______    ______
      1          7        13        19        25        31  
      2          8        14        20        26        32  
      3          9        15        21        27        33  
      4         10        16        22        28        34  
      5         11        17        23        29        35  
      6         12        18        24        30        36  
>> stackedplot(t,{1:3,4:6})

Mary Johnson 2020-10-9

编辑：Mary Johnson 2020-10-9

@Seth Furman, I am wanting the X axis to be the 6 conditions and i want the Y axis the be the mean values. I am wanting the TEST 1(Group A-C) and TEST 2(GroupD-F) both to be on the blot. YES i want to adjust plots. Yes i want to average A through C and D through F. The first plot is supposed to have (condition 1 with Mean column A, condition 2 with Mean column B, condition 3 with Mean column C). The second plot is supposed to be similart to first plot but only from (D-F) in conncected line. Thank you for the help.

Seth Furman 2020-10-9

在 MATLAB Online 中打开

Ok. So it sounds like you want something like a bar graph.

Bar graphs can be created with the "bar" function: https://www.mathworks.com/help/matlab/ref/bar.html

I've included an example of the "bar" function below. Please also check out the documentation for plotting, which you may also find helpful:

https://www.mathworks.com/help/matlab/2-and-3d-plots.html

>> t = array2table(reshape(1:36,6,6),'VariableNames',strcat("Group",["A" "B" "C" "D" "E" "F"]))
t =
  6×6 table
    GroupA    GroupB    GroupC    GroupD    GroupE    GroupF
    ______    ______    ______    ______    ______    ______
      1          7        13        19        25        31  
      2          8        14        20        26        32  
      3          9        15        21        27        33  
      4         10        16        22        28        34  
      5         11        17        23        29        35  
      6         12        18        24        30        36  
>> tMean = varfun(@mean,t)
tMean =
  1×6 table
    mean_GroupA    mean_GroupB    mean_GroupC    mean_GroupD    mean_GroupE    mean_GroupF
    ___________    ___________    ___________    ___________    ___________    ___________
        3.5            9.5           15.5           21.5           27.5           33.5    
>> tiledlayout(2,1);
>> nexttile;
>> x = categorical(t.Properties.VariableNames(1:3));
>> y = tMean{:,1:3};
>> bar(x,y);
>> nexttile;
>> x = categorical(t.Properties.VariableNames(4:6));
>> y = tMean{:,4:6};
>> bar(x,y);