Error in code, "Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses. "

clear


clc

 m1=1;

 m2=0.5;

 m3=0.2;
 
 rp=87;

 R1=rp-r1;
 R2=rp-r2;
 R3=r3-rp;
 
 l=2.27;

 r2=[58.7 27.8 20 59 30 31.2 68.5 67 34 60 39 50.3 50 45.3 45]';

 r3=[12.89 20.65 226 120 217 193.1 91.6 110 197.5 166 158.3 142.1 150 176.5 122]';


 Rb=(((1/2).1)-rp); 
 
 x=R2
 y=R3
 
 
G=x;
G(:,2) = ones(length(x), 1);
delta = G \ y
slope=delta(1,1)
intercept=delta(2,1)


m_b = m2./Rb.*slope-(m1./Rb).*R1



sigma = sqrt(sum((y-x).^2)./(length(x)-1));


se1 = sigma.*sqrt(1./((length(x)+mean(y)^2/((length(x)-1)*std(x)^2))));

se2 = sigma.*sqrt(1./((length (x)-1)*std(x)^2));


Ci1=tinv(.975,length(x)-1).*se1;

Ci2=tinv(.975,length(x)-1).*se2;

% creating a line of best fit

X = [min(x);1e-3;max(x)]';

Y = delta(1,1) + delta(2,1).*X;


SE=sigma.*sqrt(1/length(x)+(X-mean(x)).^2./((length(x)-1)*std(x).^2));

Ci=tinv(.975,length(x)-1).*SE;


figure(1)


clf


plot(m1, m2, 'ob')


hold on


% plotting the conidence intervals

plot (X, Y, 'R')

plot(X,Y+Ci,'g--')

plot(X,Y-Ci,'g--')


hold off



xlabel('$$-$$','interpreter','latex')


ylabel('$$-)$$','interpreter','latex')


print(figure(1), '-dpng', 'figure1')

[Walter Roberson]

You have a "clear" so there cannot be anything in your workspace after that.

Then you define R1=rp-r1; without having assigned anything to r1. Is r1 a function? Likewise for r2 and r3 at the point of assignment? You redefine r2 and r3 after that point, which gets confusing.

Answer 1

[Walter Roberson]

 Rb=(((1/2).1)-rp);

You do not have an operator between the (1/2) and the following .1

[ktar]

Thank you!

Answer 2

[Ruzimatjon Sultonov]

xd=0.9;
xad=0.8;
x5=0.5;
xq=0.64;
xaq=0.54;
xfd=1.68;
xfq=1.03;
xkd=0.33;
xkq=0.66;
rfd=0.282;
rfq=0.0564;
rkd=0.24;
rkq=0.17;
Dd=xd*xfd+xkd+2*(xkd^3)-xad*(xd+xfd+xkd);
Dq=xq*xfq*xkq+2*(xaq^3)-xaq*(xq+xfq+xkq);
Ad1=((xad^2)-xad*xkd)/Dd;
Ad2=((xad^2)-xd*xkd)/Dd;
Ad3=((xad^2)-xd*xad)/Dd;
Ad4=((xad^2)-xad*xad)/Dd;
Ad5=((xad^2)-xd*xad)/Dd;
Ad6=(xd*xfd-(xad^2))/Dd;
Aq1=((xaq^2)-xaq*xkq)/Dq;
Aq2=((xaq^2)-xq*xkq)/Dq;
Aq3=((xaq^2)-xq*xaq)/Dq;
Aq4=((xaq^2)-xaq*xfq)/Dq;
Aq5=((xaq^2)-xq*xaq)/Dq;
Aq6=(xq*xfq-(xaq^2))/Dq;
U=1;
Ufd=34;
Ufq=0;
theta=2.4*pi/180;
cos(theta);
xd=0.9;
xad=0.8;
x5=0.5;
xq=0.64;
xaq=0.54;
xfd=1.68;
xfq=1.03;
xkd=0.33;
xkq=0.66;
rfd=0.282;
rfq=0.0564;
rkd=0.24;
rkq=0.17;
Dd=xd*xfd+xkd+2*(xkd^3)-xad*(xd+xfd+xkd);
Dq=xq*xfq*xkq+2*(xaq^3)-xaq*(xq+xfq+xkq);
Ad1=((xad^2)-xad*xkd)/Dd;
Ad2=((xad^2)-xd*xkd)/Dd;
Ad3=((xad^2)-xd*xad)/Dd;
Ad4=((xad^2)-xad*xad)/Dd;
Ad5=((xad^2)-xd*xad)/Dd;
Ad6=(xd*xfd-(xad^2))/Dd;
Aq1=((xaq^2)-xaq*xkq)/Dq;
Aq2=((xaq^2)-xq*xkq)/Dq;
Aq3=((xaq^2)-xq*xaq)/Dq;
Aq4=((xaq^2)-xaq*xfq)/Dq;
Aq5=((xaq^2)-xq*xaq)/Dq;
Aq6=(xq*xfq-(xaq^2))/Dq;
U=1;
Ufd=34;
Ufq=0;
theta=2.4*pi/180;
cos(theta);
IFD=diff(ifd(t), t) == Ad1*U*cos(theta)-Ad2*(Ufd-rfd*ifd(t))-Aq3*rkd*ikd(t);
IFQ=diff(ikq(t) ,t)== Aq4*U*cos(theta)-Aq5*(Ufq-rfq*ifq(t))-Aq6*rkq*ikq(t);
IKD=diff(ikd(t) ,t)== Ad4*U*cos(theta)-Ad5*(Ufd-rfd*ifd(t))-Ad6*rkd*ikd(t);
IKQ=diff(ikq(t) ,t)== Aq4*Ucos(theta)-Aq5*(Ufq-rfq*ifq(t))-Aq6*rkq*ikq(t);
sistem (IFD, IFQ, IKD, IKQ) sistem=evalf(%5);
with(DEtools);
DEplot([IFD, IKD], [x1(t), x3(t), t=0..15, x1=-14..14, x3=-4..4, [[x1(0)=.99, x3(0)=0.1]], arrows=medium);

Error: File: Xarakteristika.m Line: 69 Column: 29

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or

other syntax error. To construct matrices, use brackets instead of parentheses.

Answer 3

[EN XIN NEO]

Name='Corrective with MTTR'
Type='mamdani'
Version=2.0
NumInputs=4
NumOutputs=1
NumRules=15
AndMethod='min'
OrMethod='max'
ImpMethod='min'
AggMethod='max'
DefuzzMethod='centroid'

[Input1]
Name='Budget'
Range=[0 100]
NumMFs=3
MF1='low':'trimf',[0 0.006955 20]
MF2='medium':'trimf',[20 30 50]
MF3='high':'trimf',[50 71 100]

[Input2]
Name='Frequency'
Range=[0 12]
NumMFs=3
MF1='low':'trapmf',[0 0 2 3]
MF2='medium':'trapmf',[2 3 4 5]
MF3='high':'trapmf',[4 5 12 13]

[Input3]
Name='Age'
Range=[0 30]
NumMFs=3
MF1='Young':'trapmf',[-10 0 9 10]
MF2='Mid-Age':'trapmf',[9 10 15 16]
MF3='Old':'trapmf',[15 16 30 31]

[Input4]
Name='MTTR';
Range=[0 5];
NumMFs=4;
MF1='Low':'trapmf',[-1.607 0 1.607 2]
MF2='Medium':'trapmf',[1.5 1.606577 2.7748402 3]
MF3='High':'trapmf',[2.6 2.774803 3.226124 3.3]
MF4='Very_High':'trapmf',[3.1 3.226 5 6]

[Output1]
Name='Corrective_Maintenance'
Range=[0 4]
NumMFs=3
MF1='low':'trimf',[0 1 1.5]
MF2='medium':'trimf',[1.5 2 2.5]
MF3='high':'trimf',[2.5 3 3.5]

[Rules]
1 1 0 0, 1 (1) : 1
3 3 0 0, 3 (1) : 1
0 3 0 0, 3 (1) : 1
0 1 0 0, 1 (1) : 1
1 1 1 0, 1 (1) : 1
3 3 3 0, 3 (1) : 1
3 3 2 0, 3 (1) : 1
1 3 2 0, 3 (1) : 1
3 3 2 0, 3 (1) : 1
1 1 3 0, 3 (1) : 1
3 1 3 1, 3 (1) : 1
1 1 3 1, 3 (1) : 1
3 2 1 4, 2 (1) : 1
2 3 1 2, 3 (1) : 1
3 3 3 3, 3 (1) : 1

This is my coding in mfile, it shows this error: Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets

instead of parentheses. Where should I amend

[Walter Roberson]

that is not matlab code. You need readfis https://www.mathworks.com/help/fuzzy/readfis.html

Answer 4

[Suganthi D]

clc;
clear all;
close all;
disp('Household consumption data');
filename=input('enter the file name:','s');
eval(filename);
%   serial number   devices  name     Power rating(Watts)  No.of equipments    Average hours/Day   daily energy consumption(Watts)
Household_consumption_House1=[1                "tubelight"              40              5                 6                          240
    2                "Electric Iron"         750              1                0.5                         300
    3             "Water heater/Geyser"     2000              1                0.5                         1000
    4             "Refrigerator"             150              1                 24                         3600
    5             "table fan/ceiling fan"     75              4                 10                         750
    6           "Air- conditioner"          1560              1                  5                         7800
    7             "Exhaust-fan"              150              1                  1                         150
    8            "Washing Machine"           400              1                  1                         400
    9            "Television"                100              1                  8                          800
    10           "Wet-grinder"               300              1                  2                          600
    11          "computer"                   200              1                  8                         1600
    12          "Motor 1 Hp"                 740              1                  1                         740];
Total_energy_consumption_House1= sum(daily_energy_consumption);
plot( hours, energy consumption,'r');
xlabel('Time (Hours)');
ylabel('Energy consumption (kW)');
title('daily load profile of House 1')

Good Evening sir,

I am creating the energy consumption on individual house but i got error could you please help me to resolve the problem sir..

I got this error sir..

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax

error. To construct matrices, use brackets instead of parentheses.

Answer 5

[vittal pandu]

% Enter your MATLAB code below
readChannelID = 1598383;

fieldID1 = 1;

readAPIkey = 'W5OMOQ1VN14DH9Q6';
returnPatientHealthMonitoringSystem = thinkSpeakRead(readChannelID, 'field', fieldID1, 'Readkey', readAPIkey)

[Pulse Rate in BPM, temperatue] = returnPatientHealth(returnPatientHealthMonitoringSystem);
plotPatientHealth(Pulse Rate in BPM, temperatue)

function plotPatientHealth(Pulse Rate in BPM, temperatue)
vertices = [0 0; 1 0; 1 1; 0 1];
faces = [1 2 3 4];

faceColorPatchLUT = [0 0.83 0; 0.44 0.95 0.52; 1 0.98 0.53; 0.95 0.98 0.22; 1 0.39 0.39; 1 0 0];
facecolorPatch = facecolorPatchLUT(temperatue,:);

PatientHealthPatch = patch('Faces', faces, 'vertices', vertices, 'facecolor', facecolorPatch);
hold on
text(0.5,0.5,Pulse Rate in BPM,'Fontsize',16,'HorizontalAlignment','centre')
hold off

axHandle = PatientHealthPatch.Parent;
axHandle.YTickLabel = [];
axHandle.XTickLabel = [];
end

function plotPatientHealth[Pulse Rate in BPM, temperatue] = returnPatientHealth(returnPatientHealth)
PatientHealth = {'Good';'Moderate';'Severe(should have a health check-up)'}
PatientHealthlow = [0;51;101;151;201;300;500];
PatientHealthhigh = [50,100,150,200,300,500];

lutPatientHealth = table(PatientHealth,PatientHealthlow,PatientHealthhigh,'varialbleNames',{'Patient_Health','PatientHealth_low','PatientHealth_high'})

temperatue = find(returnPatientHealth >= lut.PatientHealth_low & returnPatientHealth <= lut.PatientHealth_high)
PatientHealth = string(lutPatientHealth.Patient_Health(temperature))'
end

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

This is the error it's showing

[Walter Roberson]

function plotPatientHealth[Pulse Rate in BPM, temperatue] = returnPatientHealth(returnPatientHealth)

That line is not valid MATLAB syntax.

When you have a function line, if you have an =, then the left side of the = can be a single MATLAB identifier, or it can be a comma-separated list of identifiers in [] .

You have an identifier followed by something in [] . You cannot have anything indexed on the left side of a = for a function statement. Also, Pulse Rate in BPM is not a valid MATLAB identifier name.

function plotPatientHealth(Pulse Rate in BPM, temperatue)

The names there must be valid MATLAB identifier names. Pulse Rate in BPM is not a valid MATLAB identifier.

Answer 6

[Atul]

3sq = 9

↑

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

[Stephen23]

https://www.mathworks.com/help/matlab/matlab_prog/variable-names.html

"A valid variable name starts with a letter"

Does your variable name start with a letter? No, it does not, hence it is not a valid variable name.