xiaojuezi
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Accept 5 answers given by other contributors
Awarded to xiaojuezi on 23 Aug 2020
Feeds
Frage
How to assign the first element of each cell in a cell aray using a matrix
Hi I have a cell array A with size m x n, where each cell contains a vector of random size. Now I would like to assign the firs...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to compute uv coordinates for an arbitrary quad?
Hi For a regular grid, it is quite straightforward to get the uv coordinates for any given pixel in an image. However, for an a...
mehr als 2 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to select multiple edit fields?
Hi, In my user interface, users can specify a dimension, for exam m x n, then I draw a m x n table, where each element is an e...
fast 3 Jahre vor | 1 Antwort | 1
1
AntwortFrage
How to index with a changing index
Hi, I would like to construct a matrix L of size nxn that looks like below: L = [a,b,c,0,0,0,0,... 0,a,b,c,0,0,0,... ...
fast 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to index array with an array?
Hi I want to index an element in an array. The array u can be 1D, 2D or 3D, and I have an index id which is 1D, 2D or 3D. I'm cu...
fast 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to avoid using eval in this case?
Hi, I read in multiple threads that the usage of the function eval should be avoided as much as possible. But in the following c...
fast 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to make uicontrol edit box only show the text when needed?
Hi, I have a uicontrol edit box. When nothing is entered, by default, the edit box looks empty. Now I would like to add an addit...
etwa 3 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to apply spatially-varying blur to an image?
Hi I have an image of size 128x128, and an associated a blur map, where each element defines the size of the blur kernel. How c...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to only replot part of a graph?
Hi I'm currently plotting cubic bezier splines. My aim is that every time I move a control point, the bezier curve moves accod...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortUnrecognized property 'LabelTextColor' for class 'images.roi.Point'
The problem is solved when switching to 2020b. Thank you very much for all your help!
etwa 4 Jahre vor | 0
| akzeptiert
Frage
How to fit ascending data with piecewise linear function?
Hi, I have a vector r sorted in asending order. Now I would like to fit this r with m+1 pieces, and extract the m internal poin...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Unrecognized property 'LabelTextColor' for class 'images.roi.Point'
Hi, on the official website of matlab: https://uk.mathworks.com/help/images/ref/drawpoint.html#mw_d573bdc7-78b6-41f4-8ee9-c545...
etwa 4 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to only change part of the background color?
Hi, I have a figure as my ui. Now I would like to plot something in the middle of the ui: axes('Position',[.7 .7 .2 .2]) set (...
etwa 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Why conv2 gives opposite sign
Hi, I have a simple matrix I: I = [1,2,3,4,5; 6,7,8,9,10; 11,12,13,14,15; 16,17,18,19,20; 21,22,23,24,25] ...
mehr als 4 Jahre vor | 2 Antworten | 0
2
AntwortenHow to stick one figure to the center of another figure
I figured out a quick solution. Simply change the last part as: figure(1) imshow(img) No need to copy the object.
mehr als 4 Jahre vor | 0
Frage
How to stick one figure to the center of another figure
I have a main figure f with size 1200 x 800 working as my UI. I created another figure f2 of size 512x512 which presents an imag...
mehr als 4 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
Is there a way to input direction in matlab UI
Hi, I would like to let users to click on an image and input the normal vector of the pixel. Is there a way to let the users inp...
mehr als 4 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
How to repeat different vectors to form another vector?
Hi I would like to construct a vector as: 1,2,3,1,2,3,1,2,3,4,5,6,4,5,6,4,5,6.....k-2,k-1,k,k-2,k-1,k i.e. repeat [1,2,3], [4,...
mehr als 4 Jahre vor | 2 Antworten | 0
2
AntwortenFrage
How to plot images with different sizes in one figure?
I have 5 images and I would like to plot them like: fig1 fig2 fig3 fig4 fig5 i.e. I would like to have two rows, the fir...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
2d convolution returns empty result
I have an image matrix of size 512x512x3, for each pixel I would like to compute its weight as the average of the neighbouring p...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to use 2D logical mask on an image without for loop?
I have two image matrices A and B with size 512 x 512 x 3, and a logical mask of size 512 x 512. For each position with true val...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to change plot figure resolution
I have a few points originally designed for 512x512 resolution, such as [128,450] and [336, 500]. When plotting them, I initiall...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to know which pixels are covered by a plot?
Hi, I plotted a few curves on a 512 x 512 figure (each curve has 32 points). How could I know which pixels are covered with the ...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
How to set default background for figures to be negative
I'm currently using matlab's rasterization functionality. After I plot a curve, I saved the whole image to a matrix using img =...
mehr als 4 Jahre vor | 0 Antworten | 0
0
AntwortenFrage
How to interpolate color along a curve with specific colors?
Hi, I have a curve of dimension 50x2, and a specification of the colors at certain positions. For example, at position 1 the col...
mehr als 4 Jahre vor | 1 Antwort | 0
1
AntwortFrage
Figure automatically scales by 2
Hi, I set my figure as below: figure(1) set(gcf,'units','pixels','position',[0,0,512,512]); However, the popped figur...
mehr als 4 Jahre vor | 0 Antworten | 0
0
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