MATLAB: Multiplying or dividing vectors

arrraydividefunctionmatrixmultiplyvariablevector

I am missing something and I can't figure out what to do. I am trying to divide these 2 vectors. So I want the first number in vector one divided by the first in vector 2. The second in vector 1 divided by the second in vector 2. I get this error Error: Unbalanced or unexpected parenthesis or bracket. Where am I messing up with the syntax? I know its the "speedf." but I don't know how else to write it. Thank You.

speed=[10 20 30 40 50 60 70];
speedf=[speed.*5290/86400];
rd=[11 22 33 44 55 66 77];
rxt=[rd./speedf.]

Best Answer

speed  = 10:10:70;
speedf = speed * (5290/86400);
rd     = 11:11:77;
rxt    = rd./speedf;

The error was just the point after rd./speedf.

I suggest:

do not abuse the parentheses
try to understand when to use .* or *

Related Solutions

MATLAB: Plotting 2D Sensor data with the same value on X-axis

I am not certain what you want.

Try this:

C = { 'A'  'B'  'C'};
V = [-78 -77 -91
    -77  -77  -90
    -75  -77  -91
    -78  -77  -92
    -77  -77  -91
    -76  -77  -91
    -78  -77  -90
    -78  -77  -91
    -78  -77  -90
    -76  -77  -88
    -79  -77  -89
    -77  -77  -92
    -77  -77  -92
    -77  -77  -90
    -78  -77  -91
    -78  -77  -92
    -77  -77  -96
    -77  -77  -94
    -78  -77  -96
    -78  -77  -92
    -78  -77  -92
    -79  -77  -91
    -79  -77  -92
    -79  -77  -89
    -80  -77  -90
    -79  -77  -88
    -78  -77  -95
    -77  -77  -92
    -77  -77  -90
    -79  -77  -91
    -77  -77  -88
    -78  -77  -90
    -78  -77  -90
    -78  -77  -96
    -79  -77  -90
    -77  -77  -87];
figure(1)
plot((1:size(V,1)), V)
legend(C, 'Location','W')

MATLAB: How to automatically assign colors to data that’s being dynamically plotted and recycle the colors if there’s more data that needs to be plotted

So I think this might be what you're looking for. I commented out the 'i' redefinition at the very bottom and added 'figure' but to answer the coloring question I recommend using the mod (for modulus) command. If you specify

color{mod(i-1,4)+1}

the values, for i=1:8 for example, will go:

color{1}
color{2}
color{3}
color{4}
color{1}
color{2}
color{3}
color{4}

and the pattern will keep repeating for varying 'i' definitions. Here is the modified code:

AOI=[0 0 0 0 0 0 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 3 3 3 3 3 3 3 3 3 5 5 5 5 5 5 5 5 5 5 6 6 6 6 6 6 6 8 8 8 8 8 8];
row1=[35 35 35 35 36 36.5 37 35 37 35 36 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35 35 35 35 35 36 36.5 37 35 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35];
col1= [56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47 56 56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47];
row2=[35 35 35 35 36 36.5 37 35 37 35 36 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35 35 35 35 35 36 36.5 37 35 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35];
col2= [56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47 56 56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47];
row3=[35 35 35 35 36 36.5 37 35 37 35 36 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35 35 35 35 35 36 36.5 37 35 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35];
col3= [56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47 56 56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47];
row4=[25 25 25 25 26 26.5 27 25 27 25 26 27 26 25 27 24 24 25 26 26 26 27 27 27 28 28 24 24 25 25 25 25 25 25 25 25 25 26 26.5 27 25 27 26 25 27 24 24 25 26 26 26 27 27 27 28 28 24 24 25 25 25 25 25];
col4= [56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47 56 56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47];
row5=[35 35 35 35 36 36.5 37 35 37 35 36 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35 35 35 35 35 36 36.5 37 35 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35];
col5= [66 67 67 68 66 67 66 66 66 67 65 65 66 66 66 64 65 65 66 66 67 67 68 68 66 66 65 66 65 66 67 66 66 67 67 68 66 67 66 66 66 67 65 65 66 66 66 64 65 65 66 66 67 67 68 68 66 66 65 66 65 66 67];
row6=[35 35 35 35 36 36.5 37 35 37 35 36 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35 35 35 35 35 36 36.5 37 35 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35];
col6= [56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47 56 56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47];
row7=[35 35 35 35 36 36.5 37 35 37 35 36 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35 35 35 35 35 36 36.5 37 35 37 36 35 37 34 34 35 36 36 36 37 37 37 38 38 34 34 35 35 35 35 35];
col7= [56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47 56 56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47];
row8=[2:2:126];
col8= [56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47 56 56 57 57 58 56 57 56 56 56 57 45 45 46 46 46 44 45 45 46 46 47 47 48 48 46 46 45 46 45 46 47];
coord=[2:2:126];
times=[1:63];
AOI_unique=unique(AOI);
num_AOI=length(AOI_unique);
colors={'r' 'g' 'b' 'c' };
%while num_AOI>length(colors)
figure
hplt=plot(times,coord, 'DisplayName', 'coord\_pos\_sibs\_xfpi');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
        datetick('x','HH:MM:SS', 'keeplimits')
        title('Position of SIBS on FPI')
        xlim([min(times), max(times)])
        xlabel('Time (UT)');
        ylabel('Value');
        hold on
for i=1:length(AOI_unique)
    if AOI_unique(i)==1
        %%Plot







        hplt=plot(times, col1, colors{mod(i-1,4)+1}, 'DisplayName', 'column 1');
        hold on
        hplt=plot(times, row1, 'c--', 'DisplayName', 'row 1');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
    elseif AOI_unique(i)==2
        %%Plot
        hplt=plot(times, col2, colors{mod(i-1,4)+1}, 'DisplayName', 'column 2');
        hold on
        hplt=plot(times, row2, 'g--', 'DisplayName', 'row 2');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
    elseif AOI_unique(i)==3
        %%Plot
        hplt=plot(times, col3, colors{mod(i-1,4)+1}, 'DisplayName', 'column 3');
        hold on
        hplt=plot(times, row3, 'b--', 'DisplayName', 'row 3');
        hold on
        hleg=legend('-DynamicLegend');
        grid on
        elseif AOI_unique(i)==4
        %%Plot
        hplt=plot(times, col4, colors{mod(i-1,4)+1}, 'DisplayName', 'column 4');
        hold on
        hplt=plot(times, row4, 'r--', 'DisplayName', 'row 4');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
        elseif AOI_unique(i)==5
        %%Plot
        hpltA=plot(times, col5, colors{mod(i-1,4)+1}, 'DisplayName', 'column 5');
        hold on
        hplt=plot(times, row5, 'c--', 'DisplayName', 'row 5');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
        elseif AOI_unique(i)==6
        %%Plot
        hplt=plot(times, col6, colors{mod(i-1,4)+1}, 'DisplayName', 'column 6');
        hold on
        hpltA=plot(times, row6, 'g--', 'DisplayName', 'row 6');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
        elseif AOI_unique(i)==7
        %%Plot
        hplt=plot(times, col7, colors{mod(i-1,4)+1}, 'DisplayName', 'column 7');
        hold on
        hplt=plot(times, row7, 'b--', 'DisplayName', 'row 7');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
        elseif AOI_unique(i)==8
        %%Plot
        hplt=plot(times, col8, colors{mod(i-1,4)+1}, 'DisplayName', 'column 8');
        hold on
        hplt=plot(times, row8, 'r--', 'DisplayName', 'row 8');
        hold on
        hleg=legend('-DynamicLegend');
        set(hleg, 'FontSize',10);
        grid on
    end
%     i=i+1;
 end

Best Answer

Related Solutions

MATLAB: Plotting 2D Sensor data with the same value on X-axis

MATLAB: How to automatically assign colors to data that’s being dynamically plotted and recycle the colors if there’s more data that needs to be plotted

Related Question