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xiaojuezi


Last seen: 2 years 前 |  自 2020 起处于活动状态

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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...

2 years 前 | 1 个回答 | 0

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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...

2 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 1

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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,... ...

3 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 0

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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...

3 years 前 | 1 个回答 | 0

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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...

4 years 前 | 1 个回答 | 0

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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...

4 years 前 | 1 个回答 | 0

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已回答
Unrecognized property 'LabelTextColor' for class 'images.roi.Point'
The problem is solved when switching to 2020b. Thank you very much for all your help!

4 years 前 | 0

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提问


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...

4 years 前 | 1 个回答 | 0

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提问


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...

4 years 前 | 2 个回答 | 0

2

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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 (...

4 years 前 | 1 个回答 | 0

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提问


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] ...

4 years 前 | 2 个回答 | 0

2

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How 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.

4 years 前 | 0

提问


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...

4 years 前 | 2 个回答 | 0

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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...

4 years 前 | 0 个回答 | 0

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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,...

4 years 前 | 2 个回答 | 0

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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...

4 years 前 | 1 个回答 | 0

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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...

4 years 前 | 1 个回答 | 0

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提问


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...

4 years 前 | 1 个回答 | 0

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提问


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...

4 years 前 | 1 个回答 | 0

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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 ...

4 years 前 | 1 个回答 | 0

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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 =...

4 years 前 | 0 个回答 | 0

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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...

4 years 前 | 1 个回答 | 0

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提问


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...

4 years 前 | 0 个回答 | 0

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