Answered

how could i plot x^2+(y-x^3/2)^2=1 ?

Perhaps this — syms x y m(x,y) = (x^2+(y-x^3/2)^2-1); figure fimplicit(m, [-1 1 -1 1]*1.5) grid axis('equal') xlabel...

how could i plot x^2+(y-x^3/2)^2=1 ?

Perhaps this — syms x y m(x,y) = (x^2+(y-x^3/2)^2-1); figure fimplicit(m, [-1 1 -1 1]*1.5) grid axis('equal') xlabel...

22 days ago | 0

Answered

What is the rating of the Parks-McClellan FIR degree?

According to the documentation, the order of the filter is ‘n’ (the first output).

What is the rating of the Parks-McClellan FIR degree?

According to the documentation, the order of the filter is ‘n’ (the first output).

23 days ago | 0

Answered

I want to save [pks,locs] data for every iteration

Since the ‘[pks,locs]’ data may not be the same in every iteration, save them to cell arrays — [pks,locs] = findpeaks(sgf,'min...

I want to save [pks,locs] data for every iteration

Since the ‘[pks,locs]’ data may not be the same in every iteration, save them to cell arrays — [pks,locs] = findpeaks(sgf,'min...

23 days ago | 0

| accepted

Answered

Find closest value for each row in timetable

I am defining ‘closest’ as the minimum absolute difference between ‘Var1’ and the last two variables. (My attempt at a more d...

Find closest value for each row in timetable

I am defining ‘closest’ as the minimum absolute difference between ‘Var1’ and the last two variables. (My attempt at a more d...

23 days ago | 0

| accepted

Answered

Group wind data in clusters based on direction

One way to do this would be to use the histcounts function and get the first three outputs — WindDir = rand(100,1)*360; edgev...

Group wind data in clusters based on direction

One way to do this would be to use the histcounts function and get the first three outputs — WindDir = rand(100,1)*360; edgev...

24 days ago | 0

| accepted

Answered

cannot find existing number

See the documentation section on Floating-Point Numbers for a full explanation. Actually, I can’t reproduce that exact proble...

cannot find existing number

See the documentation section on Floating-Point Numbers for a full explanation. Actually, I can’t reproduce that exact proble...

24 days ago | 0

| accepted

Answered

Plotting amplitude spectrum of a signal

Try something like this — tmax=0.5; t=0:0.001:tmax; fs=1000; tsamp=0:1/fs:tmax; f1 = 18; f2 = 321....

Plotting amplitude spectrum of a signal

Try something like this — tmax=0.5; t=0:0.001:tmax; fs=1000; tsamp=0:1/fs:tmax; f1 = 18; f2 = 321....

24 days ago | 1

| accepted

Answered

Sort a bank of ECG samples to 2 groups

This is the best I can do for these. They required a significant amount of processing to remove the baseline variation and hi...

Sort a bank of ECG samples to 2 groups

This is the best I can do for these. They required a significant amount of processing to remove the baseline variation and hi...

25 days ago | 0

| accepted

Answered

How to find THD?

If you’re referring to total harmonic distortion, see the Simscape Electical function ee_calculateThdPercent.

How to find THD?

If you’re referring to total harmonic distortion, see the Simscape Electical function ee_calculateThdPercent.

25 days ago | 0

Answered

How do I get rid of the horizontal line on the y-axis in a line plot? Please see attached image below as an example. I want the horizontal line hidden.

Since: [x1,fs1]=audioread('Aniruddha heart beat.wav'); and x1 = 962560*2 the red line is likely the second channel in ‘x1’ ...

How do I get rid of the horizontal line on the y-axis in a line plot? Please see attached image below as an example. I want the horizontal line hidden.

Since: [x1,fs1]=audioread('Aniruddha heart beat.wav'); and x1 = 962560*2 the red line is likely the second channel in ‘x1’ ...

26 days ago | 0

| accepted

Answered

Calculate the maximum and minimum values and what day these values occured

I thought we covered a version of that in my Comment to your other thread. That dealt with the hour that the daily maximum oc...

Calculate the maximum and minimum values and what day these values occured

I thought we covered a version of that in my Comment to your other thread. That dealt with the hour that the daily maximum oc...

26 days ago | 0

| accepted

Answered

Saving data from a for loop (new-ish to MATLAB!)

Save the ‘datatable’ output to a cell array — mn_start=9; %month to start dd_start=11; %day to start date...

Saving data from a for loop (new-ish to MATLAB!)

Save the ‘datatable’ output to a cell array — mn_start=9; %month to start dd_start=11; %day to start date...

26 days ago | 0

| accepted

Answered

error "Invalid parameter name: CriticalValueType." in example code.

If I understand correctly what you’re doing, that version of the multcompare function was introduced in R2022b, according to the...

error "Invalid parameter name: CriticalValueType." in example code.

If I understand correctly what you’re doing, that version of the multcompare function was introduced in R2022b, according to the...

26 days ago | 0

| accepted

Answered

How to find number of counts for atoms (each minor grid) within XY grid?

I am not certain what you want. The histogram2 function is one option — T1 = readtable('https://www.mathworks.com/matlabcen...

How to find number of counts for atoms (each minor grid) within XY grid?

I am not certain what you want. The histogram2 function is one option — T1 = readtable('https://www.mathworks.com/matlabcen...

26 days ago | 1

| accepted

Answered

I am trying to plot acceleration-time graph by using a txt file but I got error.

The columns are reversed from your assignments. The first column is the signal, and the second column is the time vector. Tr...

I am trying to plot acceleration-time graph by using a txt file but I got error.

The columns are reversed from your assignments. The first column is the signal, and the second column is the time vector. Tr...

26 days ago | 1

| accepted

Answered

UNABLE TO PERFORM ASSIGMENT BECAUSE THE SIZE OF THE LEFT SIDE IS 1 BY 1260 AND THE SIZE OF THE RIGHT SIDE IS 1 BY 5040

One approach to fixing it (at least temporarily) is to save it to a cell array: trainingFeatures{i} = extractHOGFeatures(img, ...

UNABLE TO PERFORM ASSIGMENT BECAUSE THE SIZE OF THE LEFT SIDE IS 1 BY 1260 AND THE SIZE OF THE RIGHT SIDE IS 1 BY 5040

One approach to fixing it (at least temporarily) is to save it to a cell array: trainingFeatures{i} = extractHOGFeatures(img, ...

26 days ago | 0

Answered

String date and time identification

If they all have the same format — date= '2021-07-011407404.5' DT = datetime(date(1:16), 'InputFormat','yyyy-MM-ddHHmmss', 'F...

String date and time identification

If they all have the same format — date= '2021-07-011407404.5' DT = datetime(date(1:16), 'InputFormat','yyyy-MM-ddHHmmss', 'F...

27 days ago | 0

Answered

how to convert a Laplace transform into a transfer function value

The ‘d’ expression currently exists as a symbolic object. It needs to be transformed into a double value and then to a system o...

how to convert a Laplace transform into a transfer function value

The ‘d’ expression currently exists as a symbolic object. It needs to be transformed into a double value and then to a system o...

27 days ago | 0

Answered

Error using Dsolve: "Invalid indexing or function definition. Indexing must follow MATLAB indexing. Function arguments must be symbolic variables, and..."

The differential equations are nonlinear, so it is highly unlikely that there is an analytic solution for them. Integrate the...

Error using Dsolve: "Invalid indexing or function definition. Indexing must follow MATLAB indexing. Function arguments must be symbolic variables, and..."

The differential equations are nonlinear, so it is highly unlikely that there is an analytic solution for them. Integrate the...

28 days ago | 0

Answered

convert a string into a date and time format

Try something like this — m ='October17,196616:41:00'; DT = datetime(m, 'InputFormat','MMMMdd,yyyyHH:mm:ss', 'Format','yyyy/M...

convert a string into a date and time format

Try something like this — m ='October17,196616:41:00'; DT = datetime(m, 'InputFormat','MMMMdd,yyyyHH:mm:ss', 'Format','yyyy/M...

28 days ago | 0

| accepted

Answered

I want automatic tuning of RF filter screws

I do not have the RF Toolbox, however creating a filter as an anonymous function with appropriate arguments (I just use the pass...

I want automatic tuning of RF filter screws

I do not have the RF Toolbox, however creating a filter as an anonymous function with appropriate arguments (I just use the pass...

28 days ago | 1

Answered

Different tick values on same axis

See if the xticks call in: xticks([a+g:dxf:b-g (b-g+dxs):dxs:b]) does what you want — a=0; b=4; c=0; d=6; g=1; dxs=0.2...

Different tick values on same axis

See if the xticks call in: xticks([a+g:dxf:b-g (b-g+dxs):dxs:b]) does what you want — a=0; b=4; c=0; d=6; g=1; dxs=0.2...

28 days ago | 1

| accepted

Answered

Vertical line in plots

The xline function will plot a vertical line between the limits of the y-axis at the chosen x-value. To plot a vertical line onl...

Vertical line in plots

The xline function will plot a vertical line between the limits of the y-axis at the chosen x-value. To plot a vertical line onl...

28 days ago | 0

| accepted

Answered

Detecting start and end of signal

Try something like this — M1 = readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1251052/P05%20Trial%...

Detecting start and end of signal

Try something like this — M1 = readmatrix('https://www.mathworks.com/matlabcentral/answers/uploaded_files/1251052/P05%20Trial%...

28 days ago | 0

Answered

Uploading my code, with DataSet on this forum

The ‘Help’ section (click on the ‘More’ just to the right of ‘Browse’ above the title in this page and select the last item in t...

Uploading my code, with DataSet on this forum

The ‘Help’ section (click on the ‘More’ just to the right of ‘Browse’ above the title in this page and select the last item in t...

29 days ago | 0

Answered

How can i solve the Too many output arguments error problem ?

You are overshadowing the error function (although there are also two other error functions in the Statistics and Machine Learni...

How can i solve the Too many output arguments error problem ?

You are overshadowing the error function (although there are also two other error functions in the Statistics and Machine Learni...

30 days ago | 0

Answered

How order a dataset

One approach is to usee the sortrows function — Data = table(randi(1E4,6,1),['M';'B';'M';'M';'B';'B'], rand(6,1), randn(6,1), ...

How order a dataset

One approach is to usee the sortrows function — Data = table(randi(1E4,6,1),['M';'B';'M';'M';'B';'B'], rand(6,1), randn(6,1), ...

30 days ago | 1

Answered

Plot smoothing line without points

I am not certain what you wnat to do. Taking a guess — N = 20; x = sort(randn(1,N)); y = randn(1,N); xs = linspace(min...

Plot smoothing line without points

I am not certain what you wnat to do. Taking a guess — N = 20; x = sort(randn(1,N)); y = randn(1,N); xs = linspace(min...

30 days ago | 0

| accepted

Answered

Converting cell in double

Try something like this — LD = load(websave('ids','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1249257/ids....

Converting cell in double

Try something like this — LD = load(websave('ids','https://www.mathworks.com/matlabcentral/answers/uploaded_files/1249257/ids....

1 month ago | 0

| accepted

Answered

binary vector that consists of a zero for normal years and a 1 for a leap year

Use the eomday function — YearVct = 1950:2050; Lv = eomday(YearVct,2) == 29 % Create Logic...

binary vector that consists of a zero for normal years and a 1 for a leap year

Use the eomday function — YearVct = 1950:2050; Lv = eomday(YearVct,2) == 29 % Create Logic...

1 month ago | 0

| accepted