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Angelavtc


上次见：1个月前|自2020年以来活跃

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问题


多个曲线的指数拟合迫使曲线通过一个点（XO，YO）
I want to make different curves (existing in an array) fit an exponential function passing through a point (different for each c...

2个月前|0答案|0

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问题


combine 2 timetables with different variables into 1 timetable?
我有两个具有不同“时间格式”的时间表，我想将时间表1与时间表2合并为2，以获取时间表3作为foll ...

2个月前|1答案|0

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问题


在字符串中计数每行单词数
Say I have the following text: str = [ "an example of a short sentence" "a second short sentence"] I would like to ...

3个月前|3个答案|0

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问题


Count the number of times a word begins with "co" in a text using Text Analytics Toolbox
Dear community, I have a pdf with news headlines, and I need to count the number of words each title has and the number of time...

3个月前|1答案|0

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问题


为什么使用曲线拟合工具时X具有非阳性值的数据，我无法将功率函数拟合到数据？
Dear community, Maybe my question is obvious, but I am trying to estimate a curve with negative values for x using the "powe...

6个月前|1答案|0

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问题


Find the value of x when the first derivative is equal to 0
Hello community, I have the data x, y (.mat version) from which I compute its first derivative as follows : dy = diff(y)./d...

7个月前|1答案|0

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问题


How can I change opts.StartPoint for every loop iteration for the predefined points used by the curve fitting tool?
尊敬的社区，使用曲线拟合工具，我生成了代码以使用特定的X和Y值拟合曲线。然而，...

7个月前|1答案|0

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问题


如何用误差“使用fit> ifit> ifit（第348行）识别和擦除单元格。按模型函数计算，拟合不能继续”数组中？
Dear community, I have an array (720*1 cell) where in each cell, I have a set of variables x and y. I am estimating the best ...

7个月前|1答案|0

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问题


为什么如果我使用曲线拟合工具调整曲线，它不会像没有工具一样适合它的结果？
你好,community, I am trying to fit a series of points with a power function with and without the tool, using the same star...

8个月前|1答案|0

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问题


How can I find where to split a piecewise regression and find the parameters involved in the function?
Dear matlab community: I am trying to fit several data sets with three distinct regions. Essentially, I want to fit the coeffic...

8个月前|1答案|1

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问题


Merging three 3D plots into one
亲爱的社区，我如何将三个不同的3D图合并为一个？我的数字被保存在.fig中（我在这里附上），然后我...

9个月前|1答案|0

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问题


为什么，当我计算出与常数系列的偏度时，我不会得到NAN？
亲爱的Matlab社区，我有一个正态分布的模拟，平均值为76，标准偏差为0，WH ...

10months ago | 1 answer | 0

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问题


将多个列组合到单列中，保留列名？
亲爱的，我有一个具有尺寸为24*366的矩阵。每一行对应于一天中的时间（1小时到小时24）和每个柯鲁...

10months ago | 0 answers | 0

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问题


How to retrieve the list of numbers from which the average of a normal simulation is derived?
大家好！我目前正在使用以下代码来计算使用正常分布模拟的5000个数字的平均值...

10months ago | 2 answers | 0

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问题


由模拟产生的3-D图
Hi all, Could someone please tell me how to generate a graph like the one in the figure below? My idea is that I h...

1年前|1答案|0

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问题


Filter a timetable (balance a panel data)
您好，我有一个时间表，我想保留从我的变量“ id”中的每个值之间重合的日子。在Examp ...

1年前|1答案|0

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问题


从不包括特定日期的时间表中提取数据
Hello! I have two timetables. In the first one (tt_1) I have dates and a variable (v1). From this timetable I want to extract ...

1年前|1答案|0

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问题


使用标准偏差删除异常值
Hello everyone, I have a timetable of 8764*3. The first column corresponds to the date, the second to the hour (which goes fro...

1年前|1答案|0

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问题


If and & conditions together
如果我如何正确制定以下内容。我想将2个矢量的每个元素[x1_grid和x2_grid]与相同的...

1年前|1答案|0

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问题


如何在y中的每个点评估多项式P？
如何在y中的每个点评估多项式P？我知道polyval（p，x）也是如此，但对于x中的每个点，我都喜欢...

1年前|3个答案|0

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回答
在两条曲线之间找到延迟
It is because your graph is not shifted but it has a different scale with respect to the independent variable, thats why you fin...

2年前|0

问题


计算两条曲线之间的移位/翻译
亲爱的，有没有办法确定蓝曲线是否从紫色曲线转移了？（请参阅图）。如您之前所看到的...

2年前|1答案|0

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问题


How to find a point within a curve?
Hello to all, How can I calculate a point (the red point) on the same curve but 500 units less than the point indicated in blu...

2年前|1答案|0

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问题


How to change a variable to a time variable?
我有以下Excel文件（ejemplo.xlsx），其中第一列是日期（格式yyyy-mm-dd），第二个开始小时...

2年前|2个答案|0

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问题


How to know the date to which a group (findgroups) corresponds?
Hello! I have a timetable (TT) where one column is a Date (dd/mm/yyyy format) and another is an Hour, I applied the following ...

2年前|1答案|0

1

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回答
如何在两个图之间找到它们？
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%; 200 ；载载； 200 ；载载 ；载载 ；载载 ；载载 ；载载 ；载载200凹载凹载凹载C载集档载载载C载CCC集控载载载载载为降为%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%; 200 ；载载； 200 ；载载 ；载载 ；载载 ；载载 ；载载 ；载载200凹载凹载凹载C载集档载载载C载CCC集控载载载载载为降为%%%%%%%%%%%%%%%%%%%%%%%%%%%%%％...

2年前|0

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回答
曲线下方的区域
这是很棒的@Image分析师，因此，您帮助我回答了我在这里发布的一个问题：https：//www.tianjin-qmedu.com/ma ...

2年前|0

问题


如何在两个图之间找到它们？
Hello to all! How can I find the area in purple between the two graphs in green and blue? is there a exchange file that can do...

2年前|1答案|0

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问题


如何从数组中包含的数据中找到拐点？
Dear all, I have an array of size (360*1 cell) where in each cell I have a set of variables an data as the one that I attach h...

2年前|2个答案|0

2

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问题


Second derivative from a smoothing spline fit
你好！我有以下拟合曲线，我使用曲线拟合工具箱近似近似：我想找到点（volu ...

2年前|2个答案|0

2

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